When the temperature conversion function =CONVERT(-22, "C", "F") is applied, a reading of -22 °C in Fahrenheit is displayed. On a variety of scales, including the Fahrenheit and Celsius systems, temperature is a unit that is used to denote hotness or coolness.
Heat energy will logically go from a hotter (body with a higher temperature) to a colder (body with a lower temperature) according to temperature (one at a lower temperature).
A temperature is a measurement used to express how hot or cold something is. It demonstrates how heat energy naturally flows from a hotter body to a cooler body and can be expressed in terms of any number of arbitrary scales (one at a lower temperature).
A match is burning at a far greater temperature than an iceberg, yet an iceberg has a significantly higher total heat energy than a match. Temperature is not the same as the energy of a thermodynamic system.
The temperature, along with pressure, density, and other similar properties, is referred to as an intense property as opposed to extensive characteristics like mass or volume—one that is independent of the quantity of stuff being addressed.
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when balancing a chemical equation, it is usually best to begin with the __________.
b.) When balancing a chemical equation, it is usually best to begin with the most complicated molecule
Making ensuring that each element has the same number of atoms on both sides of the equation is the definition of balancing a chemical equation. This is significant because the number of atoms in each element must remain constant throughout a chemical reaction because the law of conservation of mass states that matter cannot be produced or destroyed. A chemical equation must have the same amount of atoms of each element in both the reactants (substances that are combined) and the products (substances that are formed) in order to be balanced. In order to balance the equation, coefficients—numbers placed in front of chemistry formulas—are typically added to the reactants and products.
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Correct Question
When balancing a chemical equation, it is usually best to begin with the _______________.
a. simplest molecule
b. most complicated molecule
c. products
d. reactants
The irreversible elementary reaction 2A → B takes place in the gas phase in an isothermal tubular (plug-flow) reactor. Reactant A and a diluent C are fed in equimolar ratio, and conversion of A is 80%. If the molar feed rate of A is cut in half, what is the conversion of A assuming that the feed rate of C is left unchanged? Assume ideal behavior and that the reactor temperature remains unchanged. What was the point of this problem?
The point of this problem was to show how the conversion of a reaction can be affected by changes in the molar feed rate of one of the reactants.
What is reactants?Reactants are the substances that take part in a chemical reaction. They are the substances that enter into the reaction and are changed into the products of the reaction. Reactants are the starting materials that are used to form the products. Reactants can be elements, compounds, or mixtures of substances. Reactants must interact with each other in order for a chemical reaction to occur. Reactants are consumed during the reaction, and the products are what is left over after the reaction has taken place. Reactants are also known as substrates in biochemistry.
The conversion of A would be 40%.
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Which substance is most likely
to be corroded by a base?
An iron nail
A zinc statue
A leather saddle
A steel beam
Answer:
an iron nail
Explanation:
iron metal can be corroded in a basic medium,
so iron nail can be corroded by a base
Answer: A leather saddle
Explanation:
Do the fingerprints created by your gel electrophoresis provide conclusive evidence of who stole the vase? Explain.
Answer: Fingerprints are not conclusive evidence on their own.
Explanation:
The thief could have worn gloves and those fingerprints could belong to the owners. If the fingerprints don't match those of the owners', you would still need more evidence to prove that those belong to the killer, such as their whereabouts at the time the vase was stolen, motive, etc. Fingerprints are not conclusive evidence on their own.
How many molecules of c02 are these in 3.56 mol of co2
The number of molecules of CO₂ present in the 3.56 mol of CO₂ is 21.442 × 10²³.
Generally, Avogadro's number is defined as the number of units in one mole of any substance (defined as its molecular weight in grams), equal to 6.02214076 × 10²³. The units of Avogadro's number may be electrons, atoms, ions, or molecules, depending on the nature of the substance and the character of the reaction (if any).
1 mol of any compound contains 6.023 × 10²³ molecules.
So, 1 mol of CO₂ contains 6.023 × 10²³ molecules.
Therefore, 3.56 mol of CO₂ contains molecules = 3.56 × 6.023 × 10²³
= 21.442 × 10²³
Hence, the number of molecules of CO₂ present in the 3.56 mol of CO₂ is 21.442 × 10²³ molecules.
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why fuse wire is made of an alloy of lead and tin?
how is light independent reactions
The Calvin-Benson cycle or the light independent process both take place in the stroma of the chloroplast. Carbohydrates are created from carbon dioxide through a sequence of chemical processes.
Light-Independent ReactionsThe energetic electrons from the light-dependent reactions supply the energy to convert carbon dioxide molecules into carbohydrates in the light-independent reactions, also known as the Calvin cycle. Because of the cyclical nature of the process, the light-independent reactions are occasionally referred to as the Calvin cycle.
The products of the light-dependent reactions are necessary for the light-independent reactions to work even though they don't involve light as a reactant and can thus occur day or night. The creation of new carbohydrate molecules is fueled by the energy carrier molecules ATP and NADPH, which are light-independent molecules. The energy carrier molecules then go back to the light-dependent processes to get more energised electrons once the energy has been delivered. Moreover, light activates a number of the enzymes involved in the light-independent processes.
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How many signals would you see in the alkene/aromatic region of a 13C NMR spectrum of the following molecule?
a. 1
b. 2
c. 3
d. 4
e. 5
The correct answer is (a) 1. The total number of signals in the alkene/aromatic region of the 13C NMR spectrum of the given molecule would be 2: one for the alkene carbons and one for the aromatic carbons. The correct answer is (a) 1.The given molecule contains two distinct types of carbon atoms: those in the alkene functional group and those in the aromatic ring.
In the alkene functional group, the carbons are sp2-hybridized and are expected to have a chemical shift range of around 120-140 ppm in the 13C NMR spectrum. Since there are two carbon atoms in this functional group, we would expect to see one signal for the alkene carbons.
In the aromatic ring, the carbon atoms are also sp2-hybridized and are expected to have a chemical shift range of around 120-160 ppm in the 13C NMR spectrum. Since there are four carbon atoms in the aromatic ring, we would expect to see one signal for the aromatic carbons.
Therefore, the total number of signals in the alkene/aromatic region of the 13C NMR spectrum of the given molecule would be 2: one for the alkene carbons and one for the aromatic carbons. The correct answer is (a) 1.
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what solute particles are present in an aqueous solution of ch3coch3 ?
In water, when CH3COCH3 dissolves, there is just one particle present in the solution.
Where does CH3COCH3 come from?Acetone's chemical formula is either CH3COCH3 or C3H6O. With only three molecules of carbon, six hydrogen atoms, but one oxygen atom, it is the most basic ketone. Two methyl groups are joined to the center carbon atom, or the sp2 hybridized carbon atom, in the acetone molecule.
Is the ester CH3COCH3?A carboxylate ester having the formula CH3COOCH3, methyl acetate is sometimes referred to as MeOAc, acetic anhydride methyl ester, or methyl ethanoate. It is a combustible liquid with a distinctively calming aroma resembling various glues & nail polish removers.
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in polymerization of carbohydrates, what kind of bond holds two monosaccharides together?
Carbohydrates are made up of monosaccharides linked together into polysaccharide chains by a type of covalent bond known as a glycosidic bond.
What is polymerization of carbohydrates?The polymers of carbohydrates are disaccharides and polysaccharides that have two or more monomers respectively. Examples of monosaccharide are: glucose, fructose and galactose and examples of disaccharides are: sucrose, lactose and maltose
Name given to covalent bond between two monosaccharides is a glycosidic bond and glycosidic bonds form between hydroxyl groups of two saccharide molecules. Polymer is a large single chain-like molecule in which repeating units derived from small molecules called monomers are bound together.
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Transcribed Image Text:A scientist mixes 0.02 g of a strong monoprotic base in 83 ml of water and obtains a pH of 12. He then realizes that he forgot to label the container and forgot what base he added. What is the most likely the identity of this base? KOH LIGH & LiOH RbOH NaOH
The identity of the base used should be NaOH.
The scientist has likely added 0.02g of NaOH to 83 ml of water and obtained a pH of 12. NaOH is a strong monoprotic base with a pKa of 13.9, meaning it will completely dissociate in water and produce a pH of 12 when 0.02g is added to 83ml of water. NaOH is also the most commonly used base in a lab setting. Therefore, it is safe to assume that the base in question is NaOH. When NaOH is added to water, it will dissociate into its ions i.e into Na+ and OH-. The hydroxide ions produced are responsible for the high pH value. The presence of Na+ ions does not have a significant effect on the pH as it is a weak acid. NaOH is a strong base because it completely dissociates in water, producing enough hydroxide ions to increase the pH to 12.
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What is the boiling point of 100% ethanol?
Answer:
Explanation:
The boiling point of 100% ethanol, or pure ethanol, at standard atmospheric pressure (1 atm or 760 mmHg) is approximately 78.37 degrees Celsius or 173.13 degrees Fahrenheit. This is slightly lower than the boiling point of water, which is 100 degrees Celsius or 212 degrees Fahrenheit at standard atmospheric pressure. However, the boiling point of ethanol can vary slightly depending on the pressure and the purity of the sample.
galena's specific gravity is 7.5, that of quartz 2.65, and that of liquid mercury 13.6. given equal-sized samples (volumes) of galena and quartz, which will feel heavier? choose one: a. they will feel about the same. b. quartz c. galena
The specific gravity of quartz is 2.65, that of liquid is 13.6, and that of galena is 7.5. Which will feel heavier, provided with equal samples (volumes) of quartz and galena
Describe the liquid state.
Liquid state is an alternative title. In physics, liquid is one of the three fundamental states of matter and is a transitional state between a crystalline solid and a gas. The volume retention and conformity to the form of a liquid's container are two of its most noticeable physical characteristics.
What characteristics do liquids possess physically?
liquids' physical characteristics. In addition, whenever a liquid is moved from one container to another, it keeps its volume but loses its shape (as long that there is no vaporisation or temperature change). These characteristics make it simple to distinguish between the liquid state and the gaseous and solid states.
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A single atom of an element has 11 protons, 11 electrons, and 12 neutrons. Which element is it?
A. V
B. Na
C. Mg
D. Se
Answer: B. Na
Explanation:
The element with 11 protons is sodium (Na), which has an atomic number of 11, indicating the number of protons in the nucleus of an atom of sodium. The atomic number uniquely identifies each element, so any element with 11 protons in its nucleus is sodium.
In addition, the atom in question has 11 electrons, which are equal in number to the protons, as atoms are electrically neutral. Furthermore, the atom has 12 neutrons, which is the total number of nucleons (protons and neutrons) in the nucleus. The atomic mass of sodium is approximately 23, which means that the most common isotope of sodium has 12 neutrons. Therefore, the atom in question has one more neutron than the most common isotope of sodium.
In summary, the atom described has 11 protons, 11 electrons, and 12 neutrons, which are the characteristics of a sodium atom with an atomic mass of approximately 23.
a helium nucleus (charge 2q and mass 4m) and a lithium nucleus (charge 3q and mass 7m) are accelerated through the same potential difference, vo. what is the ratio of their resultant kinetic energies, klithium/khelium?
The ratio of the resultant kinetic energies is given as 3 / 2
How to get the ratioA ratio is a comparison of two or more quantities or values, typically expressed in the form of a fraction. It represents how many times one value contains or is contained within another value. For example, if we have two quantities, A and B, the ratio of A to B can be expressed as A/B or as a fraction like A:B.
We have the formula as k-lithium / k-helium
where k-lithium = 3q
k-helium = 2q
such that we would have
3q / 2q
= 3/2
The ratio of their resultant kinetic energies, klithium/khelium is 3 / 2
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as you go higher in the troposphere the temperature?
Answer:
True...................
Calculate the wave length of hello light emitted by sodium lamp if the frequency of the radiation is 5x10to the power of 4
6.0×10⁵m is the wavelength of hello light emitted by sodium lamp if the frequency of the radiation is 5x10⁴.
What is wavelength?A periodic wave's wavelength is its spatial period, or the length over which its form repeats. It is a property of the both traveling waves as well as standing waves in addition to different spatial wave patterns. It refers to the distance between two successive corresponding locations of the same phase just on wave, such as two nearby crests, troughs, and zero crossings.
The spatial frequency is the reciprocal of wavelength. The Greek letter lambda is frequently used to represent wavelength. The term wavelength also was occasionally used to refer to modulated waves, their sinusoidal envelopes, or waves created by the interaction of several sinusoids.
ν=c/λ
5x10⁴=3×10⁸/λ
λ =3×10⁸/ 5x10⁴
=6.0×10⁵m
Therefore, 6.0×10⁵m is the wavelength.
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A manufacturer of helicopter blades heat-treats a part as one of the
steps of the processing procedure. Heat-treating involves heating the metal up to a highly specific temperature and then quenching, or cooling it down quickly. The blades are made from an aluminum alloy and have a mass of 273 kg. Water is normally used for the quenching phase. If the water is at a temperature of 22 Celsius, how much water (in kg) would be needed to cool the blade from 300 Celsius to 50 Celsius?
External Data: The specific heat of water is Cp = 4,180 J/kg Celsius, and the specific heat of aluminum alloy is
Cp= 900 J/kg Celsius. The equation for calculating heat gained or lost by a material is Q = mCpΔT.
Make a scientific explanation that identifies mathematical relationships that can be used to answer the question. Reason how and why energy is transferred between the metal and the water.
The mathematical relationship that can be used to answer the question is the equation for calculating heat gained or lost by a material is Q = m * Cp * ΔT. Q is the amount of heat, m is the mass of the material, Cp is the material's heat capacity, and ΔT is the temperature difference.
The equation as follows:
Q = m * Cp * ΔT
tells us that the amount of heat (Q) gained or lost by a material is equal to the mass of the material (m) multiplied by its specific heat capacity (Cp) and the change in temperature (ΔT).
In this case, we can use this equation to calculate the amount of heat lost by the aluminum alloy blade and the amount of heat gained by the water during the quenching process. Since energy is conserved, the amount of heat lost by the blade must be equal to the amount of heat gained by the water. Therefore, we can set the two equations equal to each other and solve for the mass of water needed to cool the blade:
m * Cp * ΔT (blade) = m * Cp * ΔT (water)
273 * 900 * (300 - 50) = m * 4,180 * (50 - 22)
273 * 900 * 250 = m * 4,180 * 28
m = 524.8 kg
Therefore, 524.8 kg of water would be needed to cool the blade from 300 Celsius to 50 Celsius.
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The system at equilibrium below is heated. How does the system adjust to reestablish equilibrium?
The system will shift to the left, consuming some of the added heat, in order to reestablish equilibrium.
What would happen to the equilibrium of a system if the concentration of one of the reactants was increased?If the concentration of one of the reactants was increased, the equilibrium would shift towards the products to reestablish equilibrium.
How would the addition of a catalyst affect the equilibrium of a system?The addition of a catalyst would not affect the equilibrium of a system. It would only increase the rate at which the equilibrium is reached.
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Since a proton has a positive charge, it will move in an electromagnetic field under the Coulomb force. When a proton moves in the same direction as the electric field is pointing, we can conclude that: a.) It moves from a low potential to a high potential and its electric energy decreases.It moves from a low potential to a high potential and its electric energy decreases.b.) It moves from a high potential to a low potential and its electric energy increases. c.) Both its electric potential and electric potential energy stay constant. d.) It moves from a low potential to a high potential, and its electric energy increases. e.)It moves from a high potential to a low potential and its electric energy decreases.
It changes from having a high potential to one that is low, and as a result, its electrical energy falls. Because the field itself is oriented toward rising potential energy, the electric energy continues to drop when the charge transitions from a high to a low potential.
The movement of electrically charged particles and the forces acting on them make up electrical energy (often electrons in wires, but not always). This energy is provided via a circuit's delivery of current and electric potential, sometimes known as voltage because electric potential is measured in volts (e.g., provided by an electric power utility).
It is not necessary for there to be motion (current); for instance, if there is a voltage differential combined with charged particles, such as static electricity or a charged capacitor, the moving electrical energy is usually transformed into another kind of energy (e.g., thermal, motion, sound, light, radio waves, etc.).
An illustration of the transformation of electrical energy into heat is electric heating. The simplest and most popular kind of electric heater converts energy via electrical resistance. Using electrical energy can be done in a variety of more intricate ways. Little amounts of electrical energy, such as current flowing through a transistor in a computer, are rapidly entering, exiting, and passing through millions of transistors (electric charge on the gate of a transistor which controls the current going through).
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What did Dmitri Mendeleev do that set him apart from all of the other scientist?answer choicesa. Created a list of all known elementsb. Arranged all the known elements together based on their propertiesc. Made accurate predictions about undiscovered elements based on where they would live in the periodic tabled. Accidentally discovered Plutonium
Due to his table-style representation of all known elements, Russian chemist Dmitri Mendeleev gained prominence in 1869. Every substance has a set of fundamental building blocks.
What components are described?
An element is a basic item that really is difficult to break down into smaller pieces. In chemistry and physics, an element is considered a component if non-nuclear reactions cannot destroy it. In computers and mathematics, an element is a discrete part of a larger structure or collection.
What types of elements are there?
Metals, quasi, and metalloid are the three types of elements. On the far left of the periodic chart are metals like salt, calcium, caesium, etc. The quasi, including such charcoal, chloride, and air, are usually referred as the elements on the correct side.
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what part of the curve corresponds to the optimum buffer action for the acetic acid/acetate ion pair?
The acetic anhydride ion pair's ideal buffer action is represented by point V on the curve.
What purpose does a buffer system like acetate acetic acid serve?In order to avoid pH variations that can impair the biochemical action of these molecules, acetate buffers are utilized in biosynthetic pathways of catalysts and other biochemical compounds of cells.
What does the acetate buffer do?The inhibitory effect of the acetate buffer mixture is brought on by sodium and acetic acid's interaction with the protoplasm. Whether the color solution is comprised up of borate and phosphate buffer combination at pH 7.85, the inhibitory impact of acetic acid or acetic buffer mixture is evident.
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rutherford was the first to propose modifications of mendeleev’s periodic table TRUE OR FALSE
Rutherford was the first to propose modifications of mendeleev’s periodic table - False
Ernest Rutherford is well-known for his pioneering work in nuclear physics and radioactivity, however he made no changes to Dmitri Mendeleev's periodic table. Rutherford's contributions to chemistry, on the other hand, were mostly experimental in nature, focusing on the study of atomic structure and the behaviour of electrons in atoms.
Mendeleev, on the other hand, is most known for developing the first widely accepted periodic table of elements, which he published in 1869. Mendeleev's periodic chart was based on element properties and atomic weights, and he used it to anticipate the qualities of unknown elements. Despite the fact that Mendeleev's periodic table has been updated and enlarged throughout time, he is usually credited with its inception and development.
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what is sucrose molar mass?
The molar mass of sucrose, also known as table sugar, is approximately 342.3 grams per mole (g/mol).
Sucrose is a disaccharide which is composed of glucose and fructose units, with a chemical formula of C₁₂H₂₂O₁₁. The molar mass is calculated by summing the atomic masses of all the atoms in one molecule of sucrose.
The atomic masses of carbon (C), hydrogen (H), and oxygen (O) are approximately 12.01 g/mol, 1.01 g/mol, and 16.00 g/mol, respectively. Therefore, the molar mass of sucrose can be calculated as:
(12 × 12.01 g/mol) + (22 × 1.01 g/mol) + (11 × 16.00 g/mol)
= 342.3 g/mol (approximately)
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Explain the tangible physical benefits of warming up for and cooling down from a workout activity.
i need it hurry
Mayo Clinic
A warmup gradually revs up your cardiovascular system by raising your body temperature and increasing blood flow to your muscles. Warming up may also help reduce muscle soreness and lessen your risk of injury. Cooling down after your workout allows for a gradual recovery of preexercise heart rate and blood pressure.
Egypt Today
The benefits to cooling down are :
Regulating your heart rate.
Reducing the build-up of lactic acid.
Preventing injuries Like warming up, cooling down after exercises help prevent injuries such as muscle tears. ...
Body restoration.
Stress relief and relaxation
These aren't mine, but they're both from trusted sources.
Answer:
Warming up and cooling down are important components of any workout routine. Warming up prepares your muscles for the intensity of the workout ahead, protecting them from injury and helping to improve performance. Cooling down can also help reduce the risk of injury by slowly bringing your heart rate and breathing back to normal, as well as helping muscles to recover more quickly. Additionally, stretching during the cool down can reduce muscular soreness after a workout.
what is periodic table with masses?
The periodic table with masses is very useful as the atomic mass is the average number of protons and neutrons in atoms of a chemical elements, which allows for the natural abundances of the element's isotopes.
Generally, atomic mass of an element is defined as the number of times an atom of that element which is heavier than an atom of carbon taken as 12. Basically, one atomic mass unit is equal to one-twelfth of the mass of an atom of carbon 12 isotope.
In the modern periodic table atomic number is present at the upper left, or number of protons. And in the middle the letter is the symbol used for the element (e.g., H). And below is the relative atomic mass, as calculated for the isotopes found naturally on Earth. Finally at the very bottom is the name of the element (e.g., hydrogen).
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Diane wants to maintain a record of grades she scored in the fifth, sixth, and seventh grades. She enters her grades and the total percentage she scored in a spreadsheet. Which tab on the Format Cells dialog box will enable her to display the total percentage symbol in the spreadsheet?
The number tab on the Format Cells dialog box will enable her to display the total percentage symbol in the spreadsheet.
A spreadsheet is what?A spreadsheet is a computer program that can capture, display and manipulate data arranged in rows and columns. One of the most used tools for personal computers is spreadsheets. In general, a spreadsheet is made to store numerical data and short text strings.
What does an Excel-styled cell mean?To change the formatting of cell numbers in Excel without changing the actual number, use the format cells function. We can modify the number, alignment, font style, border style, fill options, and protection with the aid of the format cells.
What purpose does an Excel spreadsheet serve?A spreadsheet is a tool for storing, modifying, and analyzing data. A spreadsheet's rows and columns of data can be searched, sorted, calculated from, and utilized to create a variety of graphs and charts.
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The energy produced by a snack in an
experiment is calculated to be 1,254 J/g.
What is the energy of the snack in
Calories/gram?
Can someone tell me why 0.3/ is correct? please
Rounding this to one decimal place gives 299.5 cal/g ≈ 0.3 cal/g, which is likely why 0.3 was given as the answer.
What is Energy?
Energy is a property of objects or systems that can be transferred to other objects or systems, or converted into different forms. It is a scalar physical quantity that can be defined as the ability to do work or produce heat. Energy exists in many forms, such as mechanical, thermal, electrical, chemical, nuclear, and electromagnetic, and can be transformed from one form to another. The SI unit of energy is the joule (J), but other units such as the calorie (cal) or the electronvolt (eV) are also commonly used in different contexts.
To convert the energy from joules per gram to calories per gram, we can use the conversion factor 1 calorie = 4.184 joules.
Thus, to find the energy of the snack in Calories/gram, we can divide the energy in joules/gram by the conversion factor:
1,254 J/g ÷ 4.184 J/cal = 299.5 cal/g
Rounding this to one decimal place gives 299.5 cal/g ≈ 0.3 cal/g, which is likely why 0.3 was given as the answer.
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what volume in milliliters of 0.512 m naoh is required to react completely with 25.0 ml 0.234 m h2so4
22.85 milliliters of 0.512 M sodium hydroxide will neutralize 25.0 milliliters of 0.234 M sulfuric acid.
What was sodium hydroxide used for?Manufacturers may use sodium hydroxide to produce soaps, rayon, paper, products that explode, dyes, and petroleum products. Other tasks that may use sodium hydroxide include processing cotton fabric, metal cleaning and processing, oxide coating, electroplating, and electrolytic extraction.
Why is sodium hydroxide harmful?Sodium hydroxide is overall considered safe for general use — but only in small amounts, at lower concentrations. At higher concentrations, sodium hydroxide is unsafe. It can cause chemical burns, as noted above, along with hives and holes in your skin. It's also very harmful if you eat it or inhale its fumes.
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what caused the object filled with water to respond the way it did when it was subjected to the flame?
When heated, the water got bigger. Because the water was so salty, salt crystallised on the surface of the container. Because the water cannot hold much heat, the bottom was able to immediately warm up.
What does water evaporation heat actually mean?A estimated estimate of the evaporation process of water is 3.5 kJ/kg, or 40.8 kJ/mol. The opposite of condensation is the process of vaporisation. The condensate heat is described as the heat released whenever one atom of the compound polymerizes at its boiling point of water under normal pressure.
What does water vaporisation heat entail?Water vaporisation heat is approximately 2,260 kJ/kg, or 40.8 kJ/mol. Condensation is the process that vaporisation is the opposite of. The heat emitted when one mole of a substance condenses now at boiling point under normal pressure is known as the heat of condensation.
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