The starting mixture contained approximately 23.62% SiO2.
What is the use of SiO2?Silicon dioxide (SiO2) has many important uses in various fields:
Glassmaking: SiO2 is a primary component of most types of glass. It is added to glass to improve its hardness, clarity, and resistance to heat and chemicals.
Ceramics: SiO2 is used in the production of ceramics and pottery as it gives the material added strength and durability.
Electronics: SiO2 is used as a dielectric material in electronic devices like transistors, integrated circuits, and microchips. It is an important component of the insulation layers that protect the electrical components and prevent them from overheating.
Construction: SiO2 is used as an important component in construction materials like concrete, bricks, and roofing tiles. Its hardness and durability make it ideal for building materials.
Cosmetics: SiO2 is used in many cosmetic products like face powders, sunscreens, and lotions. It is used as an absorbent or bulking agent that helps to give products a silky texture.
To determine the percentage of SiO2 in the starting mixture, we need to calculate the total mass of the starting mixture and the mass of SiO2 in it.
The total mass of the starting mixture is the sum of the masses of NaCl, SiO2, and CaCO3:
total mass = 1.3012 g + 0.5410 g + 0.4503 g = 2.2925 g
The mass of SiO2 in the starting mixture is given as 0.5410 g.
To calculate the percentage of SiO2 in the starting mixture, we divide the mass of SiO2 by the total mass of the mixture and multiply by 100:
% SiO2 = (mass of SiO2 / total mass) x 100
% SiO2 = (0.5410 g / 2.2925 g) x 100
% SiO2 = 23.62%
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The rate constant at 325°C for the decomposition reaction C4H8 ⟶ 2 C2H4 is 6.1×10−8
s^−1, and the activation energy is 261 kJ per mole of C4H8. Determine the frequency factor for the reaction.
The concept Arrhenius equation is used here to determine the frequency factor for the reaction. Here for the given reaction, the frequency factor is 3.814.
What is Arrhenius equation?The Arrhenius equation explains the relationship between the activation energy and rate of the reaction. The lower the activation energy, higher will be the rate of reaction. The equation is:
[tex]k=A . e^{-E_{a} } / RT[/tex]
k - rate constant
A - frequency factor
Eₐ - activation energy
R - Gas constant
T - Temperature in Kelvin
261 kJ per mole = 261000 J/mol
325°C + 273 = 598 K
6.1 × 10⁻⁸ = A . e⁻261000/ 8.314 × 598
A = 3.814
Thus the frequency factor for the reaction is 3.814.
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b) How many moles of oxygen are needed to react with 3.5 moles Fe?
Answer:
2.625
Explanation:
The balanced chemical equation is needed to determine the mole-to-mole ratio of Fe to O.
4Fe + 3O2 -> 2Fe2O3
From the equation, 3 moles of O2 react with 4 moles of Fe. Therefore, the mole-to-mole ratio of O2 to Fe is 3:4.
To find how many moles of O2 are needed to react with 3.5 moles of Fe, we can use this ratio:
3.5 moles Fe × (3 moles O2 / 4 moles Fe) = 2.625 moles O2
Therefore, 2.625 moles of O2 are needed to react with 3.5 moles Fe.
Please help!!
50.0 mL of water at 4° C frozen to ice. The volume of the ice produced is 46.0 mL. What is the density and specific gravity of the ice?
The density of the ice is approximately 1.09 g/mL and its specific gravity is approximately 1.09.
How to find the density and specific gravity of the ice?
First, we need to convert the volume of water from milliliters to grams. The density of water at 4°C is 1 g/mL. Therefore, the mass of the water is:
mass = volume × density = 50 mL × 1 g/mL = 50 g
Next, we can use the conservation of mass to find the mass of the ice produced. The mass of the ice must be equal to the mass of the water, so:
mass of ice = mass of water = 50 g
Now, we can find the density of the ice:
density = mass of ice ÷ volume of ice = 50 g ÷ 46 mL ≈ 1.09 g/mL
Finally, we can find the specific gravity of the ice by comparing its density to the density of water. Since the density of water at 4°C is 1 g/mL, the specific gravity of the ice is:
specific gravity = density of ice ÷ density of water = 1.09 g/mL ÷ 1 g/mL ≈ 1.09
Therefore, the density of the ice is approximately 1.09 g/mL and its specific gravity is approximately 1.09.
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Determine the pH at the equivalence point in the titration of 50.0 ml of 0.300 m ch3cooh with .3 M NaOH. the Value of Ka for CH3COOH is 1.8 x 10^-5
The pH at the equivalence point in the titration of 50.0 ml of 0.300 M CH₃COOH with 0.3 M NaOH is 8.61.
At the equivalence point in the titration of CH₃COOH with NaOH, the pH is determined by the hydrolysis of the salt formed, which is CH3COO⁻ and Na+.
The equation for the hydrolysis reaction is:
CH3COO⁻ + H2O ⇌ CH3COOH + OH⁻
We can use the Ka value for CH₃COOH to find the Kb value for CH3COO⁻ using the equation:
Kw = Ka x Kb
Where Kw is the ion product constant for water (1.0 x 10⁻¹⁴).
Kb = Kw/Ka
= (1.0 x 10⁻¹⁴)/(1.8 x 10⁻⁵)
= 5.56 x 10⁻¹⁰
Now we can use the Kb value to find the concentration of OH⁻ at the equivalence point using the equation:
Kb = ([OH⁻][CH3COOH])/[CH3COO⁻].
Since the concentrations of CH3COOH and CH3COO⁻ are equal at the equivalence point, we can simplify the equation to Kb = ([OH⁻]²)/[CH₃COO⁻].
Hence,
[OH-] = [tex]\sqrt{Kb(CH3COO-)}[/tex]
=[tex]\sqrt{5.56(10^{-10})(0.3) }[/tex]
= 4.06 x 10⁻⁶ M
Use the concentration of OH⁻ to find the pH at the equivalence point using the equation pOH = -log[OH-] and the relationship pH + pOH = 14.
pOH = -log(4.06 x 10⁻⁶)
= 5.39
pH = 14 - 5.39
= 8.61
Therefore, the pH at the equivalence point in the titration of 50.0 ml of 0.300 M CH3COOH with 0.3 M NaOH is 8.61.
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Question attached Below:
142.20 is the boiling point of a solution made of 75.4g of urea (CH,N₂O) dissolved in 800. g of X.
What is boiling point?Boiling point is the temperature at which a liquid boils and turns into a vapor. At the boiling point, the vapor pressure of the liquid is equal to the atmospheric pressure. The boiling point of a liquid is usually higher than its melting point, and the two points have different values for different substances.
The boiling point elevation of the solution can be calculated using the following equation:
ΔT = K*m
where K is the boiling point elevation constant and m is the molality of the solution.
To calculate the molality of the solution, we first need to calculate the moles of urea present in 75.4g.
75.4g of urea has a molar mass of 60.06 g/mol, so 75.4g of urea contains 1.25 moles.
Now, we can calculate the molality of the solution.
800 g of liquid X weighs 800 g/mol, so 800 g of liquid X contains 800 moles.
Therefore, the molality of the solution is 1.25 moles/800 moles, or 0.00156 moles/mol.
Now, we can calculate the boiling point elevation of the solution:
ΔT = K*m
ΔT = -2.43°C-kg-mol * 0.00156 moles/mol
ΔT = -0.038 °C
Therefore, the boiling point of the solution is 142.20.
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Which of the following exhibits the correct orders for both atomic radius and ionization energy, respectively? (smallest to largest) A. F, S, O, and O, S, FB. S, O, F, and F, O, SC. F, O, S, and S, O, FD. S, F, O, and S, F, O E. none of these
The atomic radius of an atom is the distance between the centre of the nucleus and the valence shell of electrons. The correct order of atomic radius and ionization energy is F, O, S, and S, O, F. The correct option is C.
What is ionization energy?The minimum amount of energy required to remove most loosely bound electron from an isolated gaseous atom of that element in the ground state is called ionization energy.
Along a period ionization energy increases and decreases down the group. The atomic radius generally increases down a group and decreases along a period.
Here 'F' has high ionization energy and it has low atomic radius.
Thus the correct option is C.
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Question attached Below:
The mass of the ammonium chloride is 69.6 g
What is the freezing point?The freezing point is the temperature at which a liquid transitions into a solid at a given pressure. At the freezing point, the vapor pressure of the solid and the liquid phases of the substance are equal, and the substance transitions from a liquid phase to a solid phase as it releases heat.
We know that;
For glycine;
ΔT = K m i
2.8 = K * 169/75 * 1/1.5 * 1
2.8 = K * 1.5
K = 2.8/1.5
K = 1.86
Then;
If I have ammonium chloride;
Let the mass of the solute be m
2.8 = 1.86 * m/53 * 1/1.5 * 1.74
2.8 = 1.86 * m/79.5 * 1.74
2.8 = 3.2m/79.5
m = 2.8 * 79.5/3.2
m = 69.6 g
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Vinegar, a common household item, is used in cleaning, cooking, baking and meat preservation. Vinegar contains acetic acid, HC2H3O2 which gives vinegar its' sour taste and pungent smell. What is the percent composition of carbon in acetic acid? I will give brainliest.
Therefore, the percent composition of carbon in acetic acid is 40.0%.
What is acetic acid?Acetic acid is a colorless, pungent liquid with a strong, sour smell. It is also known as ethanoic acid and has the chemical formula CH3COOH. Acetic acid is an organic acid that occurs naturally in some foods and is the main component of vinegar. Acetic acid is widely used in various industries, including food, medicine, and chemical production. In the food industry, it is used as a preservative and flavoring agent, and it is also used to produce pickles, mustard, and mayonnaise. In the medical industry, it is used in the production of medications, such as aspirin and antibiotics. Acetic acid is also used in the production of various chemicals, including plastics, solvents, and dyes.
Here,
The molecular formula of acetic acid is CH3COOH, which means it contains 2 carbon atoms. To determine the percent composition of carbon in acetic acid, we need to calculate the molar mass of the compound and the mass of the carbon atoms in it.
The molar mass of acetic acid is:
1 x 12.01 g/mol (C) + 2 x 1.01 g/mol (H) + 2 x 16.00 g/mol (O) = 60.05 g/mol
The mass of the carbon atoms in acetic acid is:
2 x 12.01 g/mol (C) = 24.02 g/mol
To calculate the percent composition of carbon in acetic acid, we divide the mass of the carbon atoms by the molar mass of the compound and multiply by 100:
(24.02 g/mol / 60.05 g/mol) x 100% = 40.0%
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when 5.50 g of magnesium burns in excess oxygen, the theoretical yield (amount produced) of magnesium oxide is ____ g. (molar mass: mg)
5.50 g of magnesium will produce 5.50/24.30 g of magnesium oxide, which is 0.2265 g of magnesium oxide.
What is Magnesium?Magnesium is a chemical element and an abundant mineral in the Earth's crust. It is the eighth most abundant element in the Earth's crust, and the third most abundant in seawater. It is also found in many foods, and is an essential mineral for human health. Magnesium is involved in more than 300 metabolic reactions in the body and is important for muscle and nerve function, and healthy bones. It also helps regulate blood sugar levels, blood pressure, and the production of energy and protein.
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Nitrogen gas at a stagnation temperature of 300 K and a static pressure of 2 bar flows adiabatically through a pipe duct of 0.3 m diameter. At a particular station along the duct length the Mach number is 0.6. Assuming the flow is frictionless, determine a. the static temperature and stagnation pressure of the flow; b. the mass flow of gas if the duct diameter is 0.3 m. For nitrogen gas take R 5 297 J/(kg K) and γ 5 1:4.
The static temperature and stagnation pressure of the flow are 279.9K and 2.551bar respectively.
What is stagnation pressure?Stagnation pressure, also known as pitot pressure and total pressure in fluid dynamics as well as aerodynamics, is indeed the static pressure at a place where a fluid flow has stopped.
The fluid has no motion as well as all linear acceleration has indeed been transformed to pressure energy at such a stagnation point.
a)Po/p = (1+ (γ-1)M²/2)^γ/γ-1
substituting all the given values in the above equation, we get
Po/2 = (1+ (1.4-1)0.6²/2)^1.4/1.4-1
Po =2.551bar
b)To/T = 1 +( γ-1/2)M²
substituting all the given values in the above equation, we get
300/T = 1 +( 1.4-1/2)0.6²
T=279.9K
c)M=c/√γRT
0.6=c/√1.4×8.31×279.9
c=204.68
A =πD²/4
A =3.14×0.3²/4=0.07m²
m= ρAc
m= 1.90×0.07×204
=27.16Kg/s
Therefore, the static temperature and stagnation pressure of the flow are 279.9K and 2.551bar respectively.
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WILL MAKE BRAINLIEST!! PLEASE HELP!!
1. Calculate the Hf for the reaction.
CS2(l) + 2H2O (l) CO2(g) + 2H2S(g)
2. Since you now know the Hf of this reaction, please indicate whether it is an endothermic or an exothermic reaction and why you chose your answer.
The answer is:
ΔHf = -109.2 kJ/molThe reaction is exothermic because the ΔHf value is negative.Jen makes a Venn diagram to compare active transport and passive transport.
Which label belongs in the region marked X?
Moves molecules
Uses energy
Moves from low concentration to high concentration
Moves from high concentration to low concentration
The label that belongs in the region marked X is "Moves molecules" because both active transport and passive transport involve the movement of molecules across a cell membrane.
What differentiates the active and passive transport?Active transport and passive transport are two different mechanisms by which molecules move across a cell membrane. The key differences between active and passive transport are:
Energy requirement: Active transport requires energy, usually in the form of ATP, to move molecules across the cell membrane. In contrast, passive transport does not require energy and moves molecules down their concentration gradient.
Concentration gradient: Active transport moves molecules against their concentration gradient, from an area of low concentration to an area of high concentration, while passive transport moves molecules down their concentration gradient, or the change in concentration from one place with high concentration to another.
Specificity: Active transport often involves carrier proteins or pumps that are specific to certain molecules or ions, whereas passive transport usually involves channels or transporters that are less specific.
Rate of transport: Active transport can move molecules at a faster rate than passive transport, which is limited by the diffusion rate across the membrane.
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The diagram for question is attached below:
What is the molarity of a solution that contains 125 moles nacl in 4. 00 l solution?.
The 125 moles of NaCl or sodium chloride solution in 4 l solution will have molarity 31.25 M.
The molarity of any solution is given by the formula - Molarity = number of moles ÷ volume of solution in litres.
In this question, we have the required values which are number of moles and volume of solution in litre. Therefore, keeping the values in formula to find the molarity of solution.
Molarity = 125/4
Now perform the division of values stated on Right Hand Side of the above mentioned equation
Molarity = 31.25 M
Thus, the molarity of solution is 31.25 M.
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Given the balanced chemical equation for the decomposition of ino, and the rate of disappearance of ino, complete the expressions for the rates of appearance of i2 and no.
The expressions for the rates of appearance of I₂ and NO are d[I₂] /dt and d[NO]/ dt. This is according to the chemical equilibrium.
The rate of appearance is defined as a positive quantity. The rate of appearance of a product is equals to the rate of disappearance of a reactant. chemical equilibrium is defined as the state in which both the reactants and products are present in concentrations which have no further tendency to change with time. It is a condition in the course of a reversible chemical reaction in which no net change in the amounts of reactants and products occurs. A reversible chemical reaction is defined as the reaction in which the products as soon as they are formed, react to produce the original reactants.
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The complete question is,
Given the balanced chemical equation for the decomposition for INO, and the rate of disappearance of INO, write the expressions for the rates of appearance of I2 and NO.
2INO(g) → I2(g) + 2NO(g)
Changes in temperature, pressure, and volume affect the behavior of gases more than they affect solids and liquids. _______________.
Yes, the Changes in temperature, pressure, and volume affect the behavior of gases more than they affect solids and liquids.
As the temperature will changes, the internal energy of the material will also changes. It will changes by the same amount in the gases or solids or the liquids. It is the function of the temperature. Volume of The solid does not change as much when the lot of pressure is applied.
The Pressure changes in the gases will changes the temperature and the volume a lot. The pressure changes in the liquids and the solids does not change them much. This is because of the reason that the stronger bonds in between the neighboring molecules in the liquids and the solids. In gases these attractions are very less.
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This question is incomplete question , the complete question is :
Do Changes in temperature, pressure, and volume affect the behavior of gases more than they affect solids and liquids ?
can someone please help me with question 4, i don’t understand?
14 mole of Fe will react with 9.3 mole of oxygen and produce 4.2mole of Fe[tex]_3[/tex]O[tex]_4[/tex]. The mole signifies 6.022×10²³ units, which is a very big quantity.
What is mole?In chemistry, a mole, sometimes spelt mol, is a common scientific measurement unit for significant amounts of extremely small objects like atoms, molecules, and other predetermined particles. The mole signifies 6.022×10²³ units, which is a very big quantity.
Under the International System of Units (SI), the mole is defined as this quantity as of May 20, 2019, according the General Conference upon Weights and Measurements. The amount of atoms discovered via experimentation to be present in 12 kilograms of carbon-12 was originally used to define the mole.
3 Fe + 2 O[tex]_2[/tex]→ Fe[tex]_3[/tex]O[tex]_4[/tex]
The ratio among Fe, oxygen and Fe[tex]_3[/tex]O[tex]_4[/tex] is 3:2:1
1 mole of Fe reacts with 2/3mole of oxygen
14 mole of Fe reacts with (2/3)×14=9.3 mole of oxygen
1 mole of Fe reacts with 1/3mole of Fe[tex]_3[/tex]O[tex]_4[/tex]
14 mole of Fe reacts with (1/3)×14=4.2mole of Fe[tex]_3[/tex]O[tex]_4[/tex]
Therefore, 14 mole of Fe will react with 9.3 mole of oxygen and produce 4.2mole of Fe[tex]_3[/tex]O[tex]_4[/tex].
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consider the following chemical reaction which produces hf from its constituent elements: h 2 (0)+f 2(0) 2 hf (0) delta t h=-546.6 kj/mol hydrogen and fluorine were mixed and allowed to react under constant pressure conditions, which of the following statements must be true? select as many answers as applicable however points will be deducted for incorrect guesses. the temperature of the surroundings would decrease ο triangle h= triangle u this is an endothermic reaction triangle h=0 the temperature of the surroundings would increase
As the formation of HF is an exothermic reaction, the temperature of the surroundings would increase.
What is an exothermic reaction?An exothermic reaction is defined as a chemical reaction which involves release of energy in the form of light,heat .In these reactions, energy is transferred from system to surroundings rather than taking energy from surroundings into system as in endothermic reactions.
In an exothermic reaction,change in enthalpy is negative.Therefore, it can be inferred that net amount of energy which is required to start the exothermic reaction is less than the net amount which is released by the reaction.
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inorganic compound created by the removal or replacement of one, two, or all three hydrogen atoms in phosphoric acid; used in fertilizers and detergents and is a major cause of water pollution
The inorganic compound that is created by the removal or replacement of one, two, or all three hydrogen atoms in phosphoric acid and is commonly used in fertilizers and detergents, as well as a major cause of water pollution, is called "phosphate."
What do you mean by inorganic compound?
An inorganic compound is a chemical compound that does not contain carbon-hydrogen (C-H) bonds, which are the defining characteristic of organic compounds. Inorganic compounds can be composed of a variety of elements, including metals, non-metals, and metalloids.
The inorganic compound that is created by the removal or replacement of one, two, or all three hydrogen atoms in phosphoric acid and is commonly used in fertilizers and detergents, as well as a major cause of water pollution, is called "phosphate."
Phosphate compounds are essential nutrients for plant growth and are often added to fertilizers to improve soil fertility. However, when excess phosphate is added to water bodies, it can lead to eutrophication, a process where an excessive growth of algae and other aquatic plants occur, ultimately leading to oxygen depletion and harm to aquatic life.
Phosphates are also commonly used in detergents to aid in cleaning, but they can have similar negative impacts on water quality if they are not properly treated before being discharged into waterways. Therefore, regulations are in place to limit the amount of phosphate that can be added to detergents and other products in many countries to mitigate water pollution.
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need help on this and explain
Answer:
2AlCl3 to 3Cl2
Explanation:
This is balanced equation: 2AlCl3 + 3Br2 => 2AlBr3 + 3Cl2
with 2 Al, 6 Cl and 6 Br
So 2AlCl3 to 3Cl2
Hey it would be great if someone could answer this for me quick. In this image why is the Roman numeral in #3, 1 and not 2 if the ones above were just the small numbers in the compound? How do I determine what the Roman numeral is and why do you different oxidation states, for example since Cu, copper has multiple oxidation states, like in #3&4 how do ik which one to use for which question etc. if this can be cleared up I’d appreciate it :))
Given that it is extremely simple to lose electrons, the majority of transition metals have numerous oxidation states.
What is oxidation state?The oxidation state, often known as the oxidation number, in chemistry refers to the hypothetical charge that an atom would have if all of its links to other atoms were entirely ionic. It describes how much an atom has oxidized (lost electrons) in a chemical complex. The oxidation state might theoretically be positive, negative, or zero.
Although losing electrons from transition metals is easier than from alkali metals or alkaline earth metals, most transition metals possess numerous oxidation states. Alkali metals nearly invariably contain ions with oxidation states of one because they have one electron within their valence s-orbital.
Therefore, given that it is extremely simple to lose electrons, the majority of transition metals have numerous oxidation states.
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(a) Write a balanced equation for the coupling reaction of bromobenzene on the metal surface to form biphenyl.
(b) Write balanced equations for the reactions of phenylmagnesium bromide and trityl fluoborate with water.
The balanced equation for the coupling reaction of bromobenzene on the metal surface to form biphenyl is mentioned below.
What is a coupling reaction?The coupling reactions are a class of chemical reactions where unification of two or more hydrocarbons coupled with the help of a metal catalyst.
(a) The balanced equation for the coupling reaction of bromobenzene on the metal surface to form biphenyl is:
2C₆H₅Br + 2Na → (C₆H₅)₂ + 2NaBr
(b) The balanced equations for the reactions of phenylmagnesium bromide and trityl fluoborate with water are:
PhMgBr + H₂O → PhH + MgBrOH
Trityl fluoborate + H₂O → Trityl alcohol + HBF₄
Therefore, the balanced equations are given above.
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what is the mass (in g) Of 3.01 x10^23 atoms of sodium
8.5 g is the mass of something like the ammonia (in g) 3.01 x 1023 sodium atoms.
Why is sodium used?The most common alkali metal & sixth most abundant element on the world, sodium compensates 2.8 percent of a crust of the Earth. As opposed to sodium alone, sodium salts are much more beneficial. The most often used sodium component in common salt is sodium chloride. In the winter, it is used to de-ice roads and flavour food.
What is the purpose of ammonia?Ammonia produced from industry is used as fertiliser in agriculture to the tune of 80%.Ammonia is also used to create polymers, explosives, textiles, pesticides, dyes, and other compounds in addition to its various applications. Moreover, it is utilised to clean water sources.
According to the given data:No. of molecules of the Ammonia =3.01×10
23
Molar Mass of the Ammonia =17g/mole.
Using the Formula,
No. of Molecules =Mass/Molar Mass×Avogadro
s Number.
⇒3.01×10
23
=Mass/17×6.022×10
23
Mass=
2
17
∴Mass=8.5 g.
Hence, the Mass of the Ammonia is 8.5 g.
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A thermally insulated system consists of 1.00 mol of a diatomic gas at 148 K and 2.00 mol of a solid at 178 K that are separated by a rigid insulating wall. Find the equilibrium temperature of the system after the insulating wall is removed, assuming that the gas obeys the ideal-gas law and that the solid obeys the Dulong-Petit law. HINT: the gas does no work during the expansion, so Qgas = AEint = nc', AT. K Submit
169.2K is the equilibrium temperature of the system after the insulating wall is removed.
What is equilibrium?Generally speaking, a condition of equilibrium is one in which nothing is changing. A body in equilibrium won't undergo any energy exchanges, either positive or negative. Equilibrium is defined significantly differently in biology, physics, and chemistry.
Yet the underlying idea is the same. A body in balance will be least affected by outside influences. Even when external pressures are present, the opposing forces often have a balanced impact on the item under consideration.
for gas, n1=1mol
T1= 148K
for solid,n2=2mol
T2=178K
for conservation of energy, ΔQ= Qgas+ Qsolid=0
Q= CvΔT
0=Cvgas(Teql-148) + Cvsolid(Teq-178)
0= 5/2×1×R(Teql-148) + 3×2×R(Teq-178)
Tequi= 169.2K
Therefore, 169.2K is the equilibrium temperature of the system after the insulating wall is removed.
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using the rules for naming molecular compounds described in the introduction, what is the name for the compound n2cl4 ?
Answer:
Dinitrogen Tetrachloride
Explanation:
The compound N2Cl4 is made up of two nitrogen atoms and four chlorine atoms, so it is a molecular compound.
To name molecular compounds, we use prefixes to indicate the number of each type of atom in the compound. The prefix for two is "di", and for four is "tetra". Therefore, the name of N2Cl4 would be dinitrogen tetrachloride.
Work out the density of 50,000 m³ iceberg of mass of 45,850,000 kg
917Kg/m³ is the density of 50,000 m³ iceberg of mass of 45,850,000kg. Grams per cubic centimeter are a typical unit of measurement for density.
What is density?Density is the mass of a specific material per unit volume. d = M/V, in which d is density, M is weight, and V is volume, is the formula for density. Grams per cubic centimeter are a typical unit of measurement for density. For instance, whereas Earth has a density of 5.51 grams per square centimeter, water has a density of 1 gram per cubic centimeter.
Another way to state density is in kilograms per cubic meter. For instance, air weighs 1.2 pounds per cubic metre. In textbooks and manuals, the densities of typical solids, liquids, as well as gases are stated.
density= mass/ volume
= 45,850,000 /50,000
= 917Kg/m³
Therefore, 917Kg/m³ is the density of 50,000 m³ iceberg of mass of 45,850,000kg.
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How many molecules are in 38.8g of C4H8O2?
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To calculate the number of molecules in a substance, we need to know the mass of the substance and its molar mass, and use the Avogadro's number.
The molar mass of C4H8O2 can be calculated by adding the atomic masses of all the atoms in the molecule. The atomic masses of C, H, and O are approximately 12, 1, and 16 respectively. So,
Molar mass of C4H8O2 = (4 × 12.01 g/mol) + (8 × 1.01 g/mol) + (2 × 16.00 g/mol)
= 72.10 g/mol
Now, we can use the following formula to calculate the number of molecules in 38.8 g of C4H8O2:
Number of molecules = (mass of substance / molar mass) x Avogadro's number
where Avogadro's number is approximately 6.022 × 10^23 molecules per mole.
Substituting the values, we get:
Number of molecules = (38.8 g / 72.10 g/mol) x (6.022 × 10^23 molecules/mol)
= 1.03 × 10^23 molecules
Therefore, there are approximately 1.03 × 10^23 molecules in 38.8 g of C4H8O2.
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2. explain why the gem-dimethyl groups appear as separate peaks in the proton-nmr spectrum of isoborneol, although they almost overlap in borneol.
This is most likely caused by a through-space interaction in compound isoborneol between one of the geminal methyl groups and the hydroxide, which is pointing upwards.
What is a compound?Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
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You must determine the moles of calcium chloride necessary to react with all of the unknown carbonate. If you have 0.335 grams of unknown carbonate with a molar mass of 127.330 g/mol, what is the minimum moles of calcium chloride necessary?
The minimum moles of calcium chloride necessary to react with all of the unknown carbonate is 0.0026 mol.
What is carbonate?Carbonate is a compound containing an anion of carbonate (CO3) and a cation of a metal, such as sodium, calcium, or magnesium. Carbonates are compounds of carbon and oxygen, and are found in many mineral forms, including limestone, marble, chalk, and dolomite. Carbonates are widely used in the construction, food processing, and chemical industries, and are also important components of soil and sediments.
The first step is to calculate the number of moles of carbonate present in the sample. This is done by dividing the mass of the sample by the molar mass of the carbonate:
0.335 g / 127.330 g/mol = 0.0026 mol
Next, we need to calculate the moles of calcium chloride needed to react with all of the carbonate. Since the reaction is a 1:1 ratio, we need the same number of moles of calcium chloride as the moles of carbonate present in the sample:
0.0026 mol CaCl2 = 0.0026 mol
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the mixing entropy formula derived in the previous problem actually applies to any ideal gas, and to some dense gases, liquids, and solids as well. for the denser systems, we have to assume ____
For the denser systems, we have to assume ideal mixture.
What does optimal gas mixing entropy mean?
In the special situation of ideal gases, this constant volume type of "mixing" is referred to in what is occasionally referred to as Gibbs' theorem. It claims that such a "mixing" of ideal gases has no entropy.
The mixing entropy formula discovered in the preceding issue can be used to calculate the mixing entropy of any ideal gas as well as some dense gases, liquids, and solids. We must assume for the denser systems that the two kinds of molecules are the same size and interact with one another similarly to molecules of the same type (same forces, etc.). An ideal mixture is the name given to such a setup.
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Based on your knowledge of genetics answer the following question in 3-4 paragraphs. Be sure and include relevant content vocabulary.
A 20 – year old man who has cystic fibrosis has a sister who is planning to have a child. The man encourages his sister to see a genetic counselor. What do you think the man’s reasons are for giving such advice? Please provide references that support your stance.
Answer:
The 20-year-old man's sister may be at risk of having a child with cystic fibrosis if that causes the condition. Cystic fibrosis is an inherited disorder caused by a mutation in the CFTR gene that affects the production of mucus in the body, leading to lung infections, digestive problems, and other complications. The disease is inherited in an autosomal recessive pattern, meaning that a person must inherit two copies of the defective gene (one from each parent) to develop the condition.
The man's advice to his sister to see a genetic counselor is likely motivated by his concern for her and the potential child's health. A genetic counselor is a healthcare professional who specializes in assessing and counseling individuals and families on the risks and implications of genetic conditions. A genetic counselor can provide the sister with information about her risk of being a carrier of the CFTR gene mutation and the likelihood of passing it on to her children. The counselor can also discuss the different options for testing and provide guidance on how to manage the risk of having a child with cystic fibrosis, such as through preconception or prenatal testing, genetic counseling, or assisted reproductive technologies.
The man's recommendation is in line with the current guidelines of many medical organizations, including the American College of Obstetricians and Gynecologists (ACOG), which recommend that individuals who have a family history of genetic disorders or are carriers of certain gene mutations should be offered genetic counseling and testing. This approach can help identify and manage the risk of having a child with a genetic disorder and provide support and education to families.