Which of the following is true?
A. As the temperature of a gas sample increases, the velocity distribution of the molecules shifts toward higher velocity
B. As the temperature of a gas sample decreases, the velocity distribution of the molecules shifts toward higher velocity
C. As the temperature of a gas sample increases, the velocity distribution of the molecules shifts toward lower velocity
Answers
As the temperature of a gas sample increases, the velocity distribution of the molecules shifts toward higher velocity. Therefore, option A is true.
The velocity distribution of molecules refers to the behavior of molecules in the gas. The distribution of molecular velocities in gases is measured by means of a velocity histogram. The number of molecules in a specific velocity range is represented on the vertical axis of the velocity histogram, while the horizontal axis displays the velocity range.
The kinetic energy of the molecules in the gas increases as the temperature of the gas sample rises. The molecules in the gas sample's velocity distribution exhibit increased average speed as a result of the increased kinetic energy of the molecules. In other words, as the temperature of a gas sample increases, the velocity distribution of the molecules shifts toward higher velocity (Option A). Options B and C are incorrect. This is because if the temperature of the gas sample decreases, the kinetic energy of the molecules decreases. This leads to a shift of the velocity distribution of the molecules towards lower velocity which makes option C incorrect.
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Related Questions
list the following molecules in order from most reduced state to most oxidized state: formaldehyde (ch2o), methane (ch4), carbon dioxide (co2), formic acid (hcooh), and methanol (ch3oh). a. methanol, methane, formaldehyde, formic acid, carbon dioxide. b. methane, methanol, formic acid, formaldehyde, carbon dioxide. c. carbon dioxide, formic acid, formaldehyde, methanol, methane d. methane, methanol, formaldehyde, formic acid, carbon dioxide e. carbon dioxide, formic acid, formaldehyde, methane, methanol
Answers
d. methane, methanol, formaldehyde, formic acid, carbon dioxide
Methane (CH4) is the most reduced state of the molecules listed since it has four hydrogen atoms and no atoms that can be oxidized.
C + 4.H = 0
C + 4.(1) = 0
C = -4
Methanol (CH3OH) is the second most reduced state because it includes an additional hydrogen atom.
C + 3.(H) + 1.(O-single bond) = 0
C + 3.(1) + 1.(-1) = 0
C = -2
than formaldehyde (CH2O) which is the third most reduced state.
C + 2.H + O = 0
C + 2.(1) + (-2) = 0
C = 0
formic acid (HCOOH) is the fourth most reduced state as it includes one more oxygen atom and one more hydrogen atom.
C + 1.(H) + 1.(O-double bond) + 1.(O-single bond) = 0
C + 1.(1) + 1.(-2) + 1.(-1) = 0
C = 2
carbon dioxide (CO2) is the most oxidized state as it contains two oxygen atoms which can be oxidized.
C + 2.(O-double bond) = 0
C + 2.(-2) = 0
C = +4
Therefore, the order of molecules from most reduced to most oxidized is methane, methanol, formaldehyde, formic acid, and carbon dioxide.
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All human body systems works together m. What would happen to someone if one of their systems becomes inefficient?
Answers
Answer:
lol this is what you get for stealing my points
Explanation:
What is an ideal gas?
O A. A substance whose molecules do not take up space or interact
with one another
O B. A substance that can exist in either the gaseous state or the liquid
state
C. A substance that simultaneously has properties of a liquid, gas,
and solid
D. A substance that expands to fill a container, creating pressure and
heat
Answers
Answer:
A substance whose molecules do not take up space or interact with one another
A substance whose molecules do not take up space or interact with one another, hence option A is correct.
What are molecules?Molecules are defined as the lowest fundamental unit of a chemical molecule that can participate in a chemical reaction is a group of bound atoms. The smallest identifiable unit into which a pure substance may be divided while retaining its composition and chemical properties is a molecule, which is a collection of two or more atoms.
A theoretical gas known as an ideal gas is made up of several randomly moving point particles with no interparticle interactions. Because it abides by the ideal gas law, a condensed equation of state, and is amenable to statistical mechanics analysis, the ideal gas concept is helpful. The relationship between pressure and volume in an ideal gas is described by the Ideal Gas Law.
Thus, a substance whose molecules do not take up space or interact with one another, hence option A is correct.
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Which of the following statements concerning mixtures is correct?
a. The composition of a homogeneous mixture cannot vary.
b. A homogeneous mixture can have components present in two physical states.
c. A heterogeneous mixture containing only one phase is an impossibility
d. More than one correct response..
Answers
The correct option from the given statements concerning mixtures is (d) more than one correct response.
The statement (a) "The composition of a homogeneous mixture cannot vary" is incorrect as the composition of a homogeneous mixture can vary. For example, a mixture of salt and water is homogeneous and its composition can vary depending on the amount of salt and water mixed in it.
The statement (b) "A homogeneous mixture can have components present in two physical states" is correct. Homogeneous mixtures are mixtures that are uniform throughout their composition, meaning that there is no visible difference between the components of the mixture. For example, a mixture of ethanol and water is homogeneous and its components are present in two physical states (liquid and liquid).
The statement (c) "A heterogeneous mixture containing only one phase is an impossibility" is incorrect. A heterogeneous mixture is a mixture where the components are not evenly distributed and the mixture has different visible regions or phases. However, it is possible for a heterogeneous mixture to contain only one phase. For example, a mixture of oil and water is heterogeneous but can have only one phase.
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If a gas is cooled from 323.0 K to 273.15 K and the volume is kept constant what final pressure, in atm, would result if the original pressure was 750.0 mmHg?
Answers
If a gas is cooled from 323.0 K to 273.15 K and the volume is kept constant, 0.77 atm is the final pressure, in atm, would result if the original pressure was 750.0 mmHg.
The force delivered perpendicularly to an object's surface per unit area across which the force is dispersed is known as pressure (symbol: p / P).[1]: 445 The pressure proportional to the surrounding air is known as gauge pressure, also spelt gauge pressure[a].
Pressure is expressed using a variety of units. Some of these are calculated by dividing a unit of force by a unit of area; for instance, the metric system's unit of pressure, a pascal (Pa), is equal to one newton every square metre (N/m2).
P₁/T₁ = P₂/T₂
P₂ = P₁T₂/T₁
= 0.91 atm × 273.15 K / 323 K
= 0.77 atm
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What is the only nonmetal with four valence electrons?.
Answers
Answer:
Carbon
Explanation:
I just finished this and that's what I got from my periodic table.
how many grams of H2O2 are in 3 moles of H2O2?
Answers
Answer:
The answer is 102.3!
Explanation:
you get this by multiplying 34.1 x 3 to get 102.3.
Wondering why you multiply 34.1 times 3?
WELLLLLLLLLLL...
when you get 1 mole of h202, you get 34.1 so if you ask for 3 moles of H202, you get 102.3!
A river with 25ppm phosphate and an upstream flow of 40 m ^3/s receives an agricultural discharge of 2.5 m^ 3 /s carrying 1000ppm phosphate. The chemical in the agricultural stream mix instantaneously with the main river flow. The phosphate has a first-order decay rate of 0.15/ day and the river has a cross sectional area of 20 m ^2
perpendicular to the direction of flow. A municipality located 90 km downstream of the agricultural stream discharge point withdraws water for municipal water supply purpose. a. Draw a schematic diagram of the control volume. b. Find the steady-state phosphate concentration in the water withdrawn 90 km downstream? c. Find the treatment requirement (\% removal) in the agricultural waste discharge to achieve 50mg/L concentration in the withdrawal location 80 km downstream? (Hint: Find the concentration of the waste-stream that will produce 50mg/L downstream concentration. Find \% removal from the difference of the influent wastewater concentration with respect to the initial waste-stream concentration, i.e., 1000mg/L )
Answers
The treatment requirement (% removal) in the agricultural waste discharge to achieve 50mg/L concentration in the withdrawal location 80 km downstream is 99.57%
a. Control Volume
The schematic diagram of the control volume is given below.
b. Steady-state Phosphate concentration in water withdrawn 90 km downstream
The steady-state phosphate concentration in the water withdrawn 90 km downstream is given by:
C2 = (Q1C1 + Q2C2)/(Q1 + Q2)
Where,
C2 = Concentration of phosphate in the water withdrawn 90 km downstream
C1 = Concentration of phosphate in the upstream water (25 ppm)Q1 = Upstream flow (40 m 3/s)Q2 = Agricultural discharge (2.5 m^3/s)C2 = ((40 x 25) + (2.5 x 1000)) / (40 + 2.5)C2 = 59.3 ppm
Therefore, the steady-state phosphate concentration in the water withdrawn 90 km downstream is 59.3 ppm.c. Treatment requirement (% removal) in the agricultural waste discharge to achieve 50mg/L concentration in the withdrawal location 80 km downstream
The concentration of the waste-stream that will produce 50mg/L downstream concentration is given by:
50 = (Q1C1 + Q2C2)/(Q1 + Q2)C2 = ((40 x 25) + (2.5 x C2))/(40 + 2.5)50 = (1000 x 2.5) / (40 + 2.5) + (40 x 25) / (40 + 2.5)C2 = 4.3 ppm
The % removal from the difference of the influent wastewater concentration with respect to the initial waste-stream concentration is given by:
% removal = (C in - C out) / C in x 100Where,Cin = Influent wastewater concentration (1000 ppm)
C out = Concentration of waste-stream required to produce 50 ppm downstream concentration (4.3 ppm)\% removal = (1000 - 4.3) / 1000 x 100\% removal = 99.57%
Therefore, the treatment requirement ( % removal) in the agricultural waste discharge to achieve 50mg/L concentration in the withdrawal location 80 km downstream is 99.57%.
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You have a container filled with iron and sand. You can separate the iron from the sand by using a magnet.
Answers
In the statement, they're telling us that we can separate iron from the sand. This is telling us that iron and sand is a mixture because a mixture could be separate.
A 24.0 LL tank contains 4.56×10−4kg4.56×10−4kg of helium at 19.0∘C19.0∘C. The molar mass of helium is 4.00 g/molg/mol.
What is the pressure in the tank (in pascals)?
What is the pressure in the tank (in atmospheres)?
Answers
The pressure in the tank is 27802.8 Pa or 0.274 atm.
Given:
Mass of helium (m) = 4.56×10^(-4) kg
Molar mass of helium (M) = 4.00 g/mol
Volume of tank (V) = 24.0 L
Temperature (T) = 19.0 °C = 19.0 + 273.15 K
First, let's calculate the number of moles of helium gas:
Moles of helium (n) = mass / molar mass
n = (4.56×10^(-4) kg) / (0.00400 kg/mol)
n = 0.114 mol
Now, let's calculate the pressure in the tank using the ideal gas law equation:
P * V = n * R * T
We need to convert the volume from liters to cubic meters:
V = 24.0 L = 24.0/1000 m^3
Substituting the values into the equation:
P * (24.0/1000) = (0.114 mol) * (8.314 J/(mol K)) * (19.0 + 273.15 K)
Simplifying the equation:
P = (0.114 mol) * (8.314 J/(mol K)) * (19.0 + 273.15 K) / (24.0/1000)
Calculating the pressure:
P ≈ 27802.8 Pa (or N/m^2)
To convert the pressure from pascals to atmospheres:
Pressure in atmospheres = Pressure in pascals / 101325
Pressure in atmospheres ≈ 0.274 atm
Therefore, the pressure in the tank is approximately 27802.8 Pa or 0.274 atm.
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How many moles are in 1. 82 x 10^20 atoms of silver?
Answers
1.82x10^20 atom Ag x mole
———————————————- =
1 6.023x10^23 atom
= 0.000302 moles
If the average speed of a car is 45 km/hr, how far can it travel in 0.5 hours
Answers
Answer:
22.5 Km
Explanation:
45km/hr * 0.5 hr = 22.5km
Given the functions f(x) = x2 + 6x - 1 and h(x) = 2x2 - 4x + 3. What is the vertex for each?
Answers
What tricks to use to differentiate between Ionic and Covalent bonds
Answers
Answer: first of all an ionic bonds is the electrostatic force of attraction between opposite ions and and covalent bonds is the bond between different elements mostly non metals or the sharing of electrons between elements which are mostly non metals.
Explanation: metals and non metals react to form ionic compounds
and non metals react to form covalent bonds
HOW TO DIFFERENTIATE
ionic solids the particles are charged and the forces between them are strong
covalent solids the particles are not charged and the forces between them are weak
now i would differentiate using their properties
ionic bonds / compounds
have high melting point
have low melting point
They are soluble in water
and they conduct electricity even when melted or dissolved in water
covalent bonds /compounds
they have low melting point
they have low melting point
They are insoluble
they do not conduct electricity
HOPE THIS HELPS!!!
In a chemical reaction we end up with 0.52 g of crude benzoic acid. After recrystallization 0.37 g of benzoic acid is obtained. What is the % recovery of benzoic acid in this case
Answers
Recrystallization is the process of dissolving a substance in a solvent at an elevated temperature and then slowly cooling it to form crystals. The solubility of the substance in the solvent varies at different temperatures. The impurities remain in the solution, while the pure substance crystallizes out. It's a common technique used to purify a substance. Benzoic acid is a white, crystalline, and organic compound that is used in the food and chemical industries.
The recrystallization of benzoic acid is a common undergraduate laboratory experiment. In this question, 0.52 g of crude benzoic acid is obtained from a chemical reaction, and 0.37 g of benzoic acid is obtained after recrystallization. We need to find the % recovery of benzoic acid in this case. How to calculate % recovery?% Recovery = (Pure benzoic acid obtained / crude benzoic acid used) × 100%The weight of pure benzoic acid obtained after recrystallization is 0.37 g. Crude benzoic acid obtained is 0.52 g. Substituting the values in the above formula,% Recovery = (0.37 / 0.52) × 100%≈ 71.15%Therefore, the % recovery of benzoic acid in this case is approximately 71.15%.
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This diagram shows a plant cell. Give the name of Part A
Answers
Answer:
A part is called Chloroplasts
.One ballon is filled with Hydrogen (H2) gas, the other balloon is filled with methane (CH4). Both balloons have the same temperature, pressure, and volume. Which statement is true?
A. The balloon with CH4 has more moles of gas molecules than the balloon with H2
B. The balloon with CH4 has less moles of gas molecules than the balloon with H2
C. The balloon with CH4 has the same moles of gas molecules as the balloon with H2
D. We do not have enough information to support any of the answer choices listed above
Answers
Answer:
C. The balloon with CH4 has the same moles of gas molecules as the balloon with H2
Explanation:
Based on combined gas law, gases under the same pressure, temperature and volume have the same number of moles. With this information we can say the rigth statement is:
C. The balloon with CH4 has the same moles of gas molecules as the balloon with H2how
many can be classified as an aldehyde?
How many of the following compounds can be classified as an aldehyde CH3 H₂C CH₂ 1. limonene H₂C CH3 4. ibuprofen 7. aspirin CO₂H OH H₂C O CH3 2. muscone H₂C. B CH3 CH3 CH3 5. camphor H₂
Answers
Among the given compounds, one compound can be classified as an aldehyde. Aldehyde have a carbonyl group (C=O) attached to at least one hydrogen atom.
To determine if a compound can be classified as an aldehyde, we need to identify the functional group present in each compound. Aldehydes have a carbonyl group (C=O) attached to at least one hydrogen atom.
Looking at the given compounds:
1. Limonene: Limonene does not contain a carbonyl group and therefore cannot be classified as an aldehyde.
2. Muscone: Muscone does not contain a carbonyl group and therefore cannot be classified as an aldehyde.
3. Ibuprofen: Ibuprofen does not contain a carbonyl group and therefore cannot be classified as an aldehyde.
4. Aspirin: Aspirin contains a carbonyl group, but it is in the form of a carboxylic acid (COOH) and not an aldehyde functional group.
5. Camphor: Camphor contains a carbonyl group, but it is in the form of a ketone (C=O) and not an aldehyde functional group.
Therefore, only compound 7, which is not specified in the question, could potentially be an aldehyde. Without further information, we cannot confirm its classification.
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Calculate the molarity of a solution if 32 grams of nacl is dissolved in .88 liters of solution
Answers
Answer: 0.62 M
Explanation:
molarity = (moles of solute)/(liters of solution)
If we approximate the atomic mass of Na to be 23 g/mol and the mass of Cl to be 35.5 g/mol, then the formula mass of NaCl is 58.5 g/mol.This means that 32 grams of NaCl is about 32/58.5 = 0.547 mol.Hence, the molarity is (0.547)/(.88) = 0.62 M (to 2 s.f.)
In 1996, Michael Johnson ran 10.4 m/s. Johnson's mass at the time of his record-breaking run was about 77 kg. What was his momentum at this speed?
Answers
Answer:
\(\huge\boxed{\sf P = 800.8\ Ns}\)
Explanation:
Given data:Speed = v = 10.4 m/s
Mass = m = 77 kg
Required:Momentum = P = ?
Formula:P = mv
Solution:Put the given data in the above formula.
P = (77)(10.4)
P = 800.8 Ns\(\rule[225]{225}{2}\)
Help this due today
Answers
Answer:
the question makes no sense and I'm on my forth year of college
Accurately measure approximately ( within 10%)1.00g of sodium hydroxide.
Answers
Using a digital weighing scale to accurately measure approximately ( within 10%)1.00g of sodium hydroxide.
Digital weighing has a precision of at least 0.1 g. The scale is calibrated and placed on a stable surface.
Place a weighing boat or a piece of weighing paper on the scale and press the tare button to reset the scale to zero.
Using a spatula, transfer some of the sodium hydroxide pellets or powder to the weighing boat or paper until the scale reads around 1.1 g.
Using the spatula, remove small amounts of sodium hydroxide at a time until the scale reads exactly 1.0 g.
Once you have reached 1.0 g, transfer the sodium hydroxide to a clean and dry container, such as a beaker or a test tube.
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The reaction with hydrogen with oxygen produces water: 2 H2 + O2 ---> 2H20. How many moles of O2 are required to react with 2.0 mol of H2? *
Answers
o2 is made and hydrogen help make it
how will you measure the length of a curved line by using a thread?
Answers
Tie a knot at one end of the thread.
Place the thread at the beginning of the line and try to measure a small initial portion of the line which is relatively straight.
Place your thumb at the other end of the measured portion and measure next straighter portion.
Repeat the above step till the end of line is reached. Make a knot at the end of the line.
Now, straighten the thread and measure the length of the two knots on a scale.
What is the mass number of 199F?
Answers
Answer:
fluorine
Explanation:
hope it helps
Flowing water, wind, sunlight, and nuclear materials are all resources that are used to generate electrical energy. Hydroelectric, wind, solar, and nuclear power stations are not believed to directly impact the global climate because
A.
they all use renewable energy resources and do not negatively impact ecosystems.
B.
they do not release any type of pollution into their surrounding environments.
C.
they are able to generate more electrical energy than other types of power stations.
D.
they do not directly release greenhouse gases into the atmosphere.
Answers
Hydroelectric, wind, solar, and nuclear power stations are not believed to directly impact the global climate because they all use renewable energy resources and do not negatively impact ecosystems.
What is an ecosystem?
Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system.
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A 1.0-mole sample of potassium mass is?
Answers
Answer:
Here is your ans
Explanation:
potassium mass is 39.0983u
Tq
Determine the mass of zirconium_______________, silicon__________________, and oxygen________________, found in 0.3384 mol of zircon, ZrSiO4, a semiprecious stone. Your answer must have the correct number of significant figures.Enter the number only, with no units.
Answers
1) Determine the mass of zirconium
Convert moles of zircon into moles of zirconium
\(\text{molesofZr}=0.3384molesofZrSiO_4\cdot\frac{1\text{molofZr}}{1molofZrSiO_4}=0.3384\text{molesofZr}\)Convert moles of zirconium into mass of zirconium (g)
\(\text{gramsofZr}=0.3384\text{molesZr}\cdot\frac{91.224\text{ g Zr}}{1\text{molofZr}}=30.87\text{ g Zr}\)2) Determine the mass of Silicon
Convert moles of zircon into moles of silicon
\(\text{molesofSi}=0.3384molesofZrSiO_4\cdot\frac{1\text{molofSi}}{1molofZrSiO_4}=0.3384\text{molesofSi}\)Convert moles of silicon into mass of silicon (g)
\(\text{gramsofSi}=0.3384\text{molesofSi}\cdot\frac{28.085\text{ g of Si}}{1\text{molofSi}}=9.504\text{ g Si}\)3) Determine the mass of Oxygen
Convert moles of zircon into moles of oxygen
\(\text{molesofO}=0.3384molesofZrSiO_4\cdot\frac{4\text{molofO}}{1molofZrSiO_4}=1.3536\text{molesofO}\)Convert moles of oxygen into mass of oxygen
\(\text{gramsofO}=1.3536\text{molesofO}\cdot\frac{15.999\text{ g O}}{1\text{mol of O}}=21.66gO\)The mass of zirconium is 30.87 g
The mass of silicon is 9.504 g
The mass of oxygen is 21.66 g
You examined the effects of heat on equilibrium in part iv. Was the reaction you observed endo- or exo- thermic? does heat act as a reactant or product? what happened when you removed heat by placing the solution in the ice bath? what would you expect to happen if you were to add heat?.
Answers
1) The reaction is exothermic and heat is a product
2) The color would turn to pink.
What is an endothermic reaction?Let us recall that an endothermic reaction is one in which the increase in the temperature of the system would drive the forward reaction. This implies that the equilibrium would shift to the right when the set up is heated. Since the color of the solution changes to blue when heated hence the reaction is exothermic.
If you removed heat by placing the solution in the ice bath, we can see that we have removed the heat thus we expect that the reverse reaction would take place and the color would change to pink.
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3. what is the correct name for the compound formed by one sodium atom, one hydrogen atom, one carbon atom, and three oxygen atoms?
Answers
The correct name for the compound formed by one sodium atom, one hydrogen atom, one carbon atom, and three oxygen atoms is Sodium Bicarbonate.
Sodium bicarbonate is also known as baking soda and has the chemical formula NaHCO3.
The compound consists of one sodium atom (Na), one hydrogen atom (H), one carbon atom (C), and three oxygen atoms (O). The name "bicarbonate" comes from the combination of "bi-" meaning two and "carbonate" which refers to the carbonate ion (CO3 2-). Sodium bicarbonate is a white crystalline compound that is commonly used as a leavening agent in baking. In conclusion, the correct name for the compound formed by one sodium atom, one hydrogen atom, one carbon atom, and three oxygen atoms is sodium bicarbonate or NaHCO3.
It is commonly known as baking soda, and its IUPAC name is Sodium Hydrogen Carbonate.
The compound NaHCO3 is called Sodium Bicarbonate, which is an essential compound used in various applications, including cooking and cleaning.
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