Although, a part of your question is missing, you might be referring to this full question "How does crushing a candy to smaller pieces affect its digestion?"
Crushing the candy into smaller pieces increases the surface area of the solvent which will result in the reduction of digestion or dissolution.
Digestion is the process in which food taken is broken down into smaller components that can be absorbed into the bloodstream. Digestion helps in converting food into molecules, like glucose so that the body can utilize that energy for its growth and development.
While Crushing the candy into smaller pieces, we are increasing the surface area of the solvent which will result in the reduction of digestion or dissolution of the candy. Thus, the larger the size of the pieces, the slower will be the process of digestion. This physical process in which large pieces of food are cut and crushed into smaller pieces is known as mechanical digestion.
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The volume of a sample of a gas at 0°C is 100 liters. If the volume of the gas is increased to 200 liters at constant pressure, what is the new temperature of the gas, in K?
The new temperature of a sample of gas initially at 0°C and contains 100L is 546K.
How to calculate temperature?The temperature of a gas can be calculated using the Charles' law equation as follows:
V₁/T₁ = V₂T₂
Where;
V₁ and T₁ = initial volume and temperatureV₂ and T₂ = final volume and temperatureAccording to this question, the volume of a sample of a gas at 0°C is 100 liters. If the volume of the gas is increased to 200 liters at constant pressure, the new temperature is as follows:
100/273 = 200/T₂
200 × 273 = 100T₂
T₂ = 546K
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what would go in the red square?
0.86 moles of [tex]N_2[/tex] and 1.72 moles of Li will react.
Calculation-We must place a 3 coefficient in front of Li in order to bring the equation into balance:
[tex]N_2 + 2Li = 2Li_3N[/tex]
The balanced equation demonstrates that 2 moles of Li and 1 mole of N2 react to create 2 moles of Li3N. Therefore, we can apply the following dimensional analysis to determine how many moles of Li will react with 0.86 moles of N2:
[tex]0.86 mol N_2 x (2 mol Li / 1 mol N_2) = 1.72 mol Li[/tex]
What is an equation, in your opinion?A declaration that two expressions with variables or integers are equal. In essence, equations are questions and attempts to systematically identify the solutions to these questions have been the driving forces behind the creation of mathematics.
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A new band sensation is playing a concert and recording it for a live album to be released this summer. Select all the statements that are true for band producing sound.
a. The produced sound waves are electromagnetic waves.
b. Producing sound changes the wave from an electromagnetic wave to a mechanical wave.
c. The frequency or amplitude of the sound waves will change if the singer varies their voice.
d. The produced sound waves are mechanical waves.
e. Producing sound changes the wave from mechanical wave to an electromagnetic wave.
f. Producing the sound does not change the wave type.
g. The frequency or amplitude of the sound waves will not change.
Answer:
c. The frequency or amplitude of the sound waves will change if the singer varies their voice.
d. The produced sound waves are mechanical waves.
f. Producing the sound does not change the wave type.
g. The frequency or amplitude of the sound waves will not change
These statements are true. Sound waves are mechanical waves, meaning they require a medium to travel through, such as air or water. Producing sound involves creating vibrations in the medium, which then propagate as sound waves. The frequency and amplitude of the sound waves will change depending on the characteristics of the source producing the sound. However, producing sound does not change the type of wave from mechanical to electromagnetic, or vice versa
1Li3 + 3H2O -> 1NH3 + 3LiOH
Determine the mass of lithium hydroxide produced when 0.38g of lithium nitride reacts with an excess of water.
0.785 g of lithium hydroxide (LiOH) are produced when 0.38 g of lithium nitride (Li₃N) reacts with an excess of water.
we can see that 3 moles of lithium hydroxide (LiOH) are produced for every 1 mole of lithium nitride (Li₃N) that reacts.
To determine the mass of LiOH produced from 0.38 g of Li₃N, we need to first calculate the number of moles of Li₃N present:
molar mass of Li₃N = 3 x atomic mass of Li + 1 x atomic mass of N
= 3 x 6.94 g/mol + 1 x 14.01 g/mol
= 34.83 g/mol
moles of Li₃N = mass / molar mass
= 0.38 g / 34.83 g/mol
= 0.01093 mol
Since the balanced equation shows that 1 mole of Li₃N produces 3 moles of LiOH, we can calculate the number of moles of LiOH produced:
moles of LiOH = 3 x moles of Li₃N
= 3 x 0.01093 mol
= 0.03279 mol
Finally, we can use the molar mass of LiOH to convert from moles to grams:
molar mass of LiOH = atomic mass of Li + 1 x atomic mass of O + 1 x atomic mass of H
= 6.94 g/mol + 15.99 g/mol + 1.01 g/mol
= 23.94 g/mol
mass of LiOH produced = moles of LiOH x molar mass of LiOH
= 0.03279 mol x 23.94 g/mol
= 0.785 g
Therefore, approximately 0.785 g of lithium hydroxide (LiOH) are produced when 0.38 g of lithium nitride (Li₃N) reacts with an excess of water.
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use the balance equation for the haber process, repeated below N2(g)+3H2(G)=2NH3(G)
How many moles of ammonia are produced when 5.0 moles of hydrogen reacts with excess nitrogen
The moles of the ammonia that is produced is 3.33 moles.
What is the number of moles?Stoichiometry is an important tool in chemical analysis, and it is used in a wide range of industries, including pharmaceuticals, materials science, and environmental science.
The balanced reaction equation in this case can be given as;
[tex]N_{2} (g)+3H_{2} (g)--- > 2NH_{3} (g)[/tex]
If 3 moles of hydrogen produces 2 moles of ammonia
5 moles of hydrogen will produce 5 * 2/3
= 3.33 moles
Thus we have 3.33 moles of ammonia.
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All of the following are unique properties of water except ____
Water has high specific heat.
Water has high heat of vaporization.
Water expands when it freezes.
Water is a non polar molecule.
Answer:
Water is a non polar molecule
Explanation:
Water interacts differently with charged and polar substances than with nonpolar substances because of the polarity of its own molecules. Water molecules are polar, with partial positive charges on the hydrogens, a partial negative charge on the oxygen, and a bent overall structure.
2Li + 1Fe(NO3)2 = 1Fe + 2LiNO3
How many moles of iron (II) nitrate would be needed to produce 4 moles of lithium nitrate?
Total, 2 moles of iron (II) nitrate would be needed to produce a 4 moles of lithium nitrate.
The balanced chemical equation for the reaction is;
2Li + 1Fe(NO₃)₂ → 1Fe + 2LiNO₃
From this equation, we can see that 2 moles of lithium nitrate are produced for every 1 mole of iron (II) nitrate used.
To determine how many moles of iron (II) nitrate are needed to produce 4 moles of lithium nitrate, we can use the mole ratio from the balanced equation;
moles of LiNO₃ = 4
moles of Fe(NO₃)₂ = (4 mol LiNO₃) x (1 mol Fe(NO₃)₂ / 2 mol LiNO₃)
= 2 mol Fe(NO₃)₂
Therefore, 2 moles of iron (II) nitrate is needed to produce 4 moles of lithium nitrate.
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I WILL GIVE 35 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS PLEASE
The solution has a molarity of 0.0924 M.
What is molarity, for instance?The number of moles of solute per litre of solution is known as molarity.. For instance, water is both the solution and the solute when table salt is dissolved in it. Each mole of sodium chloride weighs 58.44 grammes. 58.44 grammes of sodium chloride are dissolved in one litre of water to produce one molar solution, or 1M.
Moles of solute per litre of solution is known as molarity (M).
Given: moles of NH3 = 0.355, volume of solution = 3.84 L
Molarity = 0.355 moles / 3.84 L = 0.0924 M
Therefore, the molarity of the solution is 0.0924 M.
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If both compounds are strong electrolytes, which compound would have the higher conductivity
Show a greater conductivity than the covalent compound. This is because of the existence of strong electrostatic forces between the ions of the ionic compounds.
What are the forces ?A force is an external agent capable of changing a body's state of rest or motion. It has a magnitude and a direction.A force is not something that an object contains or 'has in it'. A force is exerted on one object by another. The idea of a force is not limited to living things or non-living things.
What are ions ?it is formed by the loss or gain of an electron by an atom. Ions are of two types: cations and anions. For example, A sodium ion (Na+ ) is formed when a sodium atom loses one electron.
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After a jar of liquid has been sealed, the level of the liquid decreases slightly because of evaporation. After a slight decrease, the level of the liquid ceases to change. Why?
Explanation: The level of the liquid in a sealed jar decreases slightly due to the evaporation of some of the liquid molecules into the air space above the liquid. However, once the concentration of the liquid molecules in the air space reaches a certain level, the rate of evaporation will slow down. This is because the concentration of the liquid molecules in the air space will eventually reach a point where the rate of evaporation is balanced by the rate of condensation.
At this point, the liquid molecules in the air space will be colliding with the surface of the liquid at the same rate that liquid molecules are evaporating from the surface of the liquid. As a result, the level of the liquid will cease to change, and the liquid will remain at a stable level within the jar.
Water in a truck's radiator can get hotter than 100 °C when the radiator is sealed tightly. How is it possible for water to exist as a liquid at temperatures above its normal boiling point?
which three (3) patterns are true regards to seasons on earth
Three patterns that are true regarding seasons on Earth are: 1. Seasons are caused by the tilt of Earth's axis. 2. Seasons are opposite in the Northern and Southern Hemispheres. 3. Seasons are characterized by changes in temperature and weather patterns.
As Earth orbits around the sun, different parts of the planet receive varying amounts of sunlight depending on their angle to the sun.
When it is summer in the Northern Hemisphere, it is winter in the Southern Hemisphere, and vice versa.
For example, summer is typically associated with warm temperatures, longer days, and increased humidity, while winter is associated with colder temperatures, shorter days, and often snow or rain.
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3. Consider this unbalanced equation: NH4NO3 → N₂O + H₂O
a. If we allow 4.122 moles of NH4NO3 to decompose, how much water will be
produced?
b. If we allow 4.122 moles of NH4NO3 to decompose, how much dinitrogen
monoxide will be produced?
When heated, ammonium nitrate decomposes explosively according to the balancing equation: 2 NH₄NO₃(s) + 2 N₂(g) + 4 H₂O(g) Calculate the total volume of gas generated by the full breakdown of 1.55 kg of ammonium nitrate (at 125 °C and 748 mmHg).
Does [tex]NH_{4} NO_{3}[/tex] produce [tex]NO_{2}[/tex] when heated?When ammonium nitrate is heated, it produces nitrous oxide and water molecules. When ammonium nitrate (NH₄NO₃) is heated, it produces nitrous oxide (N₂O) and water (H₂O).
Endothermic dissolution of ammonium nitrate in water occurs because more energy is consumed to separate the ions in the solid than is created when the ions establish new connections with water molecules.
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Consider this unbalanced equation: Na₂Cr₂O7+ HCI → CrCl3 + NaCl + Cl₂ + H₂O
a. If we introduce 12g of HCl into this equation, how many moles of sodium
chloride are produced?
b. If we introduce 2.1 moles of sodium dichromate into this reaction, how many
moles of chromium (III) chloride are produced?
a. On introducing 12g of HCl, 0.047 moles of sodium chloride are produced and b. On introducing 2.1 moles of sodium dichromate, 4.2 moles of chromium (III) chloride are produced.
How to calculate number of moles of a molecule?Number of moles = Mass of the molecule (in grams) / Molar mass of the molecule (in grams per mole)
a. To solve this problem, we need to balance the chemical equation first:
Na₂Cr₂O7 + 14HCl → 2CrCl₃ + 2NaCl + 7Cl₂ + 7H₂O
The balanced equation shows that for every 14 moles of HCl, 2 moles of NaCl are produced.
So, to find the number of moles of NaCl produced from 12g of HCl, we first need to convert grams to moles using the molar mass of HCl.
Molar mass of HCl = 1.008 + 35.453 = 36.461 g/mol
Number of moles of HCl = mass / molar mass = 12g / 36.461 g/mol = 0.329 mol
Now, we can use the mole ratio from the balanced equation to find the number of moles of NaCl produced:
2 moles NaCl / 14 moles HCl * 0.329 mol HCl = 0.047 moles NaCl
Therefore, 0.047 moles of sodium chloride are produced.
b. Using the balanced equation from part a, we can see that the mole ratio between sodium dichromate and chromium (III) chloride is 1:2.
So, if 2.1 moles of sodium dichromate are introduced, we can find the number of moles of chromium (III) chloride produced by multiplying the number of moles of sodium dichromate by the mole ratio:
2.1 moles Na₂Cr₂O₇ * 2 moles CrCl₃ / 1 mole Na₂Cr₂O₇ = 4.2 moles CrCl₃
Therefore, 4.2 moles of chromium (III) chloride are produced.
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A scientist hiking in a desert observes a cliff. The scientist makes a drawing of the layers of rock in the cliff and the types of fossils observed in the layers. Based on observations, the scientist determines layers 3 and 5 were formed from cooled lava. The scientist's drawing is shown above.
Identify the oldest layer in the rock cliff and explain your reasoning for the layer chosen.
Due to the principle of overlay, in an intact sequence of sedimentary stones, every single layer of rock is elder that the one above and younger that the one below it, with the oldest rocks at the bottom as the latest ones at the top
How did you identify the initial layering on the rock's layers diagram?The multiple vertical layers of sedimentary material demonstrate the original horizontality concept (see Figure below). The law in deposition states that the youngest layers of rocks occupy the highest point whereas the earliest were at the bottom.
According to the rule on combination, how might the earliest slabs of rock get found?The Theory of superposition, that asserts that in an unbroken horizontal succession of rocks, the most ancient layers are on the bottom, and gradually younger ones on top, aids geologists in correlating rock strata all around the world.
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The force that holds water molecules together in a raindrop is called.
OA. polar attraction
OB. magnetic attraction
OC. covalent bonding
OD. ionic bonding
A: Polar Attraction, because water molecules have a slightly positive charge on one end and a slightly negative charge on the other end, which causes them to be attracted to each other due to electrostatic forces.
What is Polar attraction?Polar attraction is the attraction between two polar molecules. Polar molecules contain atoms with slightly different charges, resulting in a slightly positive end and a slightly negative end of the molecule. The attractive force that occurs between two polar molecules is the result of the positively charged end of one molecule being attracted to the negatively charged end of the other molecule. This type of attraction is known as a dipole-dipole interaction.
What are electrostatic forces?Electrostatic forces are forces of attraction or repulsion between particles that are caused by their electrical charge. Electrically charged particles are either positively or negatively charged, and they exert a force on each other that is proportional to the magnitude of their charges, and inversely proportional to the square of the distance between them. Electrostatic forces can be used to explain phenomena such as the attraction of dust particles to surfaces and the clustering of ions in a solution.
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Use the E2 mechanism to explain why when I is mixed with sodium ethoxide (NaOCH2CH3) in ethanol, the major product
is III, but when II is mixed with sodium ethoxide in ethanol, the major product is IV.
Two alkenes may be produced when sodium ethoxide is used to treat 2-Bromo-3-methylbutane in ethanol. Saytzeff's rule governs the reaction pathway, leading to the formation of 2 methyl 2 butene as the main product, which is a more substituted alkene.
What is the purpose of sodium ethoxide?Inorganic synthesis uses sodium ethoxide, 21% w/w in ethanol, as a powerful base. It is used in a variety of chemical processes, including esterification, alkoxylation, condensation, and etherification. It participates actively in the Wolf-Kishner reduction, Stobbe reaction, and Claisen condensation.
Because ethoxide ions are Brnsted-Lowry bases and remove hydrogen ions from water molecules to form hydroxide ions, which raise the pH, the solution is extremely alkaline.
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Which of these would a chemist most likely study?
why airplanes are able to fly
how rain affects statues
why monkeys have tails
where earthquakes tend to occur
A chemist would most likely study how rain affects statues as it involves analyzing the physical and chemical changes caused by rainfall on different materials, such as metal or limestone.
Explanation:A chemist would most likely study 'how rain affects statues'. This query falls under the domain of chemistry as it involves the study of physical and chemical changes caused by rainfall on different materials. Rainwater, due to the presence of various dissolved gases, can be slightly acidic. When this water comes in contact with statues, especially those made of certain metals or limestone, it can react causing corrosion or weathering, which a chemist would study.
In the case of metal statues, the acidic nature of rainwater can initiate corrosion processes, leading to the gradual degradation of the metal's surface. This phenomenon involves chemical reactions that a chemist is well-equipped to elucidate and study.
For statues crafted from limestone or other calcareous materials, rainwater can cause weathering, a process that involves chemical dissolution and physical erosion. Understanding the chemical intricacies of these reactions falls squarely within the purview of chemistry.
Hence, the study of 'how rain affects statues' inherently encompasses the investigation of the chemical alterations and transformations induced by rainfall, rendering it a quintessential domain of chemistry. This research not only sheds light on the impact of environmental factors on cultural artifacts but also contributes to the broader understanding of chemical interactions in the natural world.
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How much dry solute would you take to prepare 118 mL of 0.105 M NaNO3
The amount of dry solute it would take to prepare 118 mL of 0.105 M NaNO3 is 1.05g.
How to calculate mass?The mass of a substance can be calculated by multiplying the number of moles in the substance by its molar mass as follows:
mass = no of moles × molar mass
However, the number of moles it took to prepare 118 mL of 0.105 M NaNO3 must be calculated as follows;
no of moles = 0.105 × 0.118 = 0.0124 moles
molar mass of sodium nitrate = 85g/mol
mass = 85g/mol × 0.0124 moles = 1.05g
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5. It is important to make certain that there is no air bubble in the tip of the burette below the stopcock before the initial reading of the liquid level in the burette is taken. If a 0.5ml air bubble is present in the tip of a burette, what percent error in 5-mL, 20-mL, and 25-mL samples will result if the air bubble is dislodged during the dispensing of the samples?
Answer:
If a 0.5 mL air bubble is present in the tip of a burette, the initial reading will be too high by 0.5 mL. If the air bubble is dislodged during the dispensing of the samples, the final reading will be too low by 0.5 mL. This will result in a systematic error in the volume measurements.
To calculate the percent error in the volume measurements, we can use the formula:
% error = (systematic error / true value) x 100
For a 5-mL sample, the true value is 5 mL. If the air bubble is dislodged, the measured volume will be 4.5 mL, resulting in a systematic error of 0.5 mL. Therefore, the percent error is:
% error = (0.5 / 5) x 100 = 10%
For a 20-mL sample, the true value is 20 mL. If the air bubble is dislodged, the measured volume will be 19.5 mL, resulting in a systematic error of 0.5 mL. Therefore, the percent error is:
% error = (0.5 / 20) x 100 = 2.5%
For a 25-mL sample, the true value is 25 mL. If the air bubble is dislodged, the measured volume will be 24.5 mL, resulting in a systematic error of 0.5 mL. Therefore, the percent error is:
% error = (0.5 / 25) x 100 = 2%
So, the percent error in the volume measurements will be higher for smaller samples, and lower for larger samples.
The percent error for a 5 mL sample is 10%, for a 20 mL sample is 2.5%, and for a 25 mL sample is 2%.
Explanation:The percent error can be calculated using the formula:
Percent Error = ((Actual Value - Experimental Value) / Actual Value)×100%
In this case, the actual value is the volume of the sample (5 mL, 20 mL, or 25 mL) and the experimental value is the volume obtained if the air bubble is dislodged.
The percent error for a 5 mL sample would be:
Percent Error = ((5 mL - 4.5 mL) / 5 mL ) ×100% = 10%
The percent error for a 20 mL sample would be:
Percent Error =( (20 mL - 19.5 mL) / 20 mL) ×100% = 2.5%
The percent error for a 25 mL sample would be:
Percent Error = ((25 mL - 24.5 mL) / 25 mL) × 100% = 2%
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Calculate to what temperature 75.0 grams of carbon tetrachloride gas, CCl4 would need to be heated to have a volume of 2.00 liters at 250 °C.
(Ideal Gas Law Problem)
Answer:
The CCl4 gas would need to be heated to -178.7 °C to have a volume of 2.00 liters at 250 °C.
Step-by-step explanation:
First, we need to calculate the number of moles of CCl4:
[tex]\sf:\implies n = \dfrac{m}{M}[/tex]
[tex]\sf:\implies n = \dfrac{75.0\: g}{154.0\: g/mol}[/tex]
[tex]\sf:\implies n = 0.487\: moles[/tex]
Next, we can use the ideal gas law to solve for the temperature:
[tex]\sf\qquad\dashrightarrow PV = nRT[/tex]
where:
P is the pressureV is the volumen is the number of molesR is the gas constant (0.08206 L·atm/mol·K)T is the temperature in KelvinWe need to convert the given temperature of 250 °C to Kelvin:
[tex]\sf:\implies T = 250 ^{\circ}C + 273.15[/tex]
[tex]\sf:\implies T = 523.15\: K[/tex]
Now we can plug in the values and solve for T:
[tex]\sf:\implies (1\: atm)(2.00\: L) = (0.487\: mol)(0.08206\: L\cdot atm/mol\cdot K)T[/tex]
[tex]\sf:\implies T = \dfrac{(1\: atm)(2.00\: L)}{(0.487\: mol)(0.08206\: L\cdot atm/mol\cdot K)}[/tex]
[tex]\sf:\implies T = 94.5\: K[/tex]
Finally, we need to convert the temperature back to Celsius:
[tex]\sf:\implies T = 94.5\: K - 273.15[/tex]
[tex]\sf:\implies \boxed{\bold{\:\:T = -178.7 ^{\circ}C\:\:}}\:\:\:\green{\checkmark}[/tex]
Therefore, the CCl4 gas would need to be heated to -178.7 °C to have a volume of 2.00 liters at 250 °C.
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The compound NaOH is a base by all three of the theories we discussed
in class. However, each of the three theories describes what a base is in
different terms. Use your knowledge of these three theories to describe
NaOH as an Arrhenius base, a Brønsted-Lowry base, and a Lewis base.
NaOH is a base through all 3 definitions of base: Arrhenius, Bronsted-Lowry, and Lewis.
Arrhenius
An Arrhenius base is defined as a compound that increases the OH⁻ concentration in an aqueous solution. In other words, Arrhenius bases are compounds that have an OH⁻ ion. NaOH does dissolve into Na⁺ + OH⁻, so it will increase the OH⁻ of a solution. This means the compound is an Arrhenius base.
Bronsted-Lowry
Bronsted-Lowry bases are defined as a species that can accept a proton. Remember that a proton can be shown as H⁺. As stated above, NaOH dissolves into Na⁺ + OH⁻. In this form, the OH⁻ can accept the H⁺ to create H₂O. Thus, NaOH is a Bronsted-Lowry base.
Lewis Base
Lewis bases are compounds that can donate an electron pair. The O in dissolved NaOH has 3 electron pairs, which is what causes the negative charge on OH⁻. The O is able to donate one of the electron pairs to another species during a reaction. So, NaOH is a Lewis base.
Write the equation to find the distance from speed and time
If you shout into the Grand Canyon, your voice travels at the speed of sound (340 m/s) to the bottom of the canyon and back, and you hear an echo. How deep is the Grand Canyon at a spot where you can hear your echo 5.2 seconds after you shout? Please SHOW YOUR WORK and INCLUDE UNITS!
The depth of the Grand Canyon at the spot where you can hear your echo 5.2 seconds after you shout is 884 meters.
The equation to find the distance from speed and time is:
distance = speed x time
In this problem, we are given the speed of sound (340 m/s) and the time it takes for the sound to travel to the bottom of the canyon and back (5.2 s). To find the distance from the top of the canyon to the bottom, we can use the above equation:
distance = speed x time = 340 m/s x 5.2 s = 1768 m
However, this distance represents the total distance traveled by the sound wave, which includes the distance from the top of the canyon to the bottom and back to the top. Since we are only interested in the depth of the canyon, we need to divide the total distance by two:
depth of canyon = distance / 2 = 1768 m / 2 = 884 m
Therefore, the depth of the Grand Canyon at the spot where you can hear your echo 5.2 seconds after you shout is 884 meters.
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student recorded the dates in may on which they observed a full moon and last quarter moon. Om which dates will most likely be able to observe a new moon?
The first quarter is the point in the lunar cycle where the moon is one (1) week after the new moon has risen. At first quarter, the moon will also be in its "waning gibbous" phase.
A full moon and a new moon are two different things?The moon is called a "new moon" when it lies between the sun and the Earth, as opposed to a "full moon," which occurs when the moon is directly above. Furthermore, because we cannot even see the new moon from Earth, unlike full moons, it appears as though it doesn't exist at all.
A half (1/2) or 50% of the moon is lighted during the waning gibbous phase, which occurs once per new moon.
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In this unbalanced chemical reaction, how many grams of H2O will be produced, if 4.95g of Fe3O4 are reacted completely with hydrogen?
we can estimate that approximately 1.54 grams of water will be produced when 4.95 grams of Fe3O4 react completely with hydrogen.
The balanced chemical equation for the reaction between Fe₃O₄ and hydrogen is:
Fe₃O₄ + 4H₂ → 3Fe + 4H₂O
we can see that 4 moles of hydrogen react with 1 mole of Fe₃O₄ to produce 4 moles of water.
To find the number of moles of Fe₃O₄ in 4.95g, we need to divide the mass by the molar mass of Fe₃O₄ :
4.95 g Fe₃O₄ / (231.53 g/mol Fe₃O₄ ) = 0.0214 mol Fe₃O₄
According to the mole ratio in the balanced equation, 4 moles of hydrogen produce 4 moles of water. Therefore, we can calculate the number of moles of hydrogen required to react with 0.0214 mol Fe₃O₄ :
0.0214 mol Fe₃O₄ × (4 mol H2 / 1 mol Fe₃O₄ ) = 0.0855 mol H2
Finally, we can use the molar mass of water to calculate the mass of water produced:
0.0855 mol H₂O × (18.02 g/mol H2O) = 1.54 g H₂O
Therefore, we can estimate that approximately 1.54 grams of water will be produced when 4.95 grams of Fe₃O₄ react completely with hydrogen.
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Dilute laboratory bench reagents are generally 6.0 M. What volume of dilute HCI must be used to prepare 500 mL of 0.25 M HCI?
Answer:
Volume required ≈ 20.8 mL
Dilutions:When a solution is diluted, the total number of moles of solute (n), does not change. Only the total solution volume changes. As n=cV (molarity formula, where n = moles, c = concentration, V = volume), then the value of cV is a constant when diluting solutions. This can be expressed by the ratio:
c₁V₁ = c₂V₂, where subscripts 1 and 2 represent the concentrated and dilute solutions.
To dilute a solution of 6.0 M HCl to 0.25 M with a total volume of 0.500 L, we can use the dilution formula, where initial and final concentrations = 6.0 M and 0.25 M respectively, and final volume = 0.500 L (500 mL).
Hence, 6.0×V₁ = 0.25×0.500 = 0.125
V₁ = 0.125/6.0 = 0.02083 L
Therefore, the volume we require is ≈ 20.8 mL
How many lone pairs of electrons are in the ion OH⁻?
0
1
3
6
There are 1 lone pairs of electrons are in the ion OH⁻
An OH ion has how many lone pairs?Since oxygen creates two bonds, we know that two electrons are required to create those two bonds. There are now just two electron pairs remaining that are not involved in bonding. Oxygen thus contains two lone pairs.
Is there a single pair of electrons in OH?The O and H atoms are connected by a solitary covalent link. The oxygen atom has a net -1 charge, which normally manifests as the whole charge on the OH- ion. On the O atom in the OH- Lewis structure, there exist lone electron pairs.
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What is the mass of percent of 10 g solute in 105 g solvent?
The mass of the percent of the 10 g solute in the 105 g solvent is 8.69 %.
The mass of the solute = 10 g
The mass of the solvent = 105 g
The mass of the solution = 10 g + 105 g
The mass of the solution = 115 g
The mass of the percent is expressed as :
The mass of percent = ( mass of solute / mass of solution ) × 100 %
The mass of solute = 10 g
The mass of solution = 115 g
The mass of percent = ( 10 / 115 ) × 100 %
The mass of percent = 8.69 %
Thus, the mass of percent is 8.69 % and the mass of solute is 10 and the mass of the solution is 115 g.
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PLS help ill mark you as brainlist
High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressures used in this procedure range from around 500 kilopascals (500,000 Pa ) to about 60,000 kPa (60,000,000 Pa ). It is often convenient to know the pressure in torr. If an HPLC procedure is running at a pressure of 2.09×108 Pa, what is its running pressure in torr?
Express the pressure numerically in torr.
The running pressure of the HPLC procedure in torr is approximately 2068.2687 torr.
What is Chromatography?
Chromatography is a technique used to separate, identify, and analyze the components of a mixture based on their differential affinities to a stationary phase and a mobile phase. It is widely used in chemistry, biochemistry, pharmaceuticals, environmental science, forensics, and other fields for purification, separation, and analysis of chemical compounds.
To convert pressure from pascals (Pa) to torr, we can use the following conversion:
1 torr = 101325 Pa
So, to convert the pressure from pascals to torr, we can divide the pressure in pascals by 101325.
Given:
Pressure in pascals (Pa) = 2.09 × [tex]10^{8}[/tex] Pa
Using the conversion factor:
Pressure in torr = (2.09 × [tex]10^{8}[/tex]Pa) / 101325 Pa/torr
Calculating the numerical value in torr:
Pressure in torr = 2068.2687 torr (rounded to four decimal places)
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I need the math to it to show how I got to the answer, please help
The volume (in liters) of ammonia, NH₃ produced from the reaction is 127 liters (option C)
How do i determine the volume of ammonia produced?First, we shall determine the mole in 17 g of H₂. Details below:
Mass of H₂ = 17 grams Molar mass of H₂ = 2 g/mol Mole of H₂ =?Mole = mass / molar mass
Mole of H₂ = 17/ 2
Mole of H₂ = 8.5 moles
Next, we shall determine the volume of H₂. Details below:
1 mole of hydrogen gas, H₂ = 22.4 Liters
Therefore,
8.5 moles of hydrogen gas, H₂ = (1.24 mole × 22.4 Liters) / 1 mole
8.5 moles of hydrogen gas = 190.4 liters
Finally, we shall determine the volume of ammonia, NH₃ produced. This is shown below:
N₂(g) + 3H₂(g) -> 2NH₃(g)
From the above equtaion,
3 liters of H₂ reacted with 2 liters of NH₃
Therefore
190.4 liters of H₂ will react = (190.4 liters × 2 liters) / 3 liters = 127 liters of NH₃
Thus, from the above illustration, we can conclude that the volume of ammonia, NH₃ produced is 127 liters (option C)
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