CHEMISTRY HIGH SCHOOL

At what temperature is a gas likely to have the lowest rate of diffusion?10
150
b
210
с
249
d
300

Answers

Answer 1

Answer:

Answer:

150

Explanation:

A gas will have the lowest rate of diffusion the lowest temperature from a given set of temperature values.

Since 150 is the lowest value, then this represents the lowest rate of diffusion.

The rate of diffusion is related to the prevalent temperature. When gases diffuse, they move from regions of high concentration to the at of low concentration. They must have enough kinetic energy to move in order to diffuse.

The higher the temperature, the more the kinetic energy and higher rate of diffusion.

Answer 2

Answer:

Answer:

15º

Explanation:

The rate of diffusion is lower when the temperature is lower. Since 15º is the lowest temperature of the answers, it has the lowest rate of diffusion.

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For Gay-Lussac's law, temperature is measured in _____.
Hydrocarbons are separated from each other by a process called cracking distillation. a. True b. False
Can someone solve 5 ?
Are all elements abbreviated with one or two letters? If not, name some that aren't.

A neutron is a particle that carries a negative charge.

Answers

This statement is false, neutrons are a neutral atomic particle

A chemical reaction is at equilibrium. Compared to the rate of the forward reaction, the rate of the reverse reaction is(1) faster and more reactant is produced
(2) faster and more product is produced
(3) the same and the reaction has stopped
(4) the same and the reaction continues in both directions

Answers

A chemical reaction is at equilibrium. Compared to the rate of the forward reaction, the rate of the reverse reaction is the same and the reaction continues in both directions and the correct option is option 4.

What is Chemical Equilibrium?

Chemical equilibrium refers to the state of a system in which the concentration of the reactant and the concentration of the products do not change with time, and the system does not display any further change in properties.

It is the state of a reversible reaction where the rate of the forward reaction equals the rate of the reverse reaction. While a reaction is in equilibrium the concentration of the reactants and products are constant.

Therefore, A chemical reaction is at equilibrium. Compared to the rate of the forward reaction, the rate of the reverse reaction is the same and the reaction continues in both directions and the correct option is option 4.

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Answer:

choice 4

Explanation:

the reaction is constant but it does not stop, therefore it's choice 4

Which is a basic funcional group that can accept H+ and become positively charged? A) CH ₃ B) OH C) NH₂ D) COOH

Answers

C) NH2

EXPLANATION:
the amino group (NH2) is a basic, or alkaline, group which can accept a proton (H+) and become positively charged.

What is the mass percent of sodium in NaCl?

Answers

The mass percent of sodium in NaCl can be determined by dividing the mass of sodium by the total mass of the compound (NaCl), then multiplying the result by 100. So, 39.34% of the mass of sodium in NaCl is composed of sodium.

The molecular weight of chlorine (Cl) is 35.45 g/mol while that of sodium (Na) is 22.99 g/mol.

The molecular weight of NaCl is calculated as follows:

Na: 1 atom * 22.99 g/mol = 22.99 g/mol
Cl: 1 atom * 35.45 g/mol = 35.45 g/mol

Total molecular weight = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol

To determine the sodium mass percent in NaCl:

(mass of sodium / total mass of NaCl) * 100 to get the mass percent of sodium.

(22.99 g/mol / 58.44 g/mol) x 100 = 39.34% sodium mass percent

As a result, 39.34% of the mass of sodium in NaCl is composed of sodium.

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mass percent of sodium is mass of sodium divided by total mass of NaCl then multiplied by 100%. That means that percent mass equals (23g/58.45g)×100% which equals 39.3%.
Therefore the percent mass of sodium in NaCl is 39.3%
I hope this helps. Let me know if anything is unclear.

Explain why hydrogen and oxygen are considered elements whereas water is not considered an element.

Answers

Elements are the simplest building blocks you can break matter down into using purely chemical methods. They are a pure substance made up from only one type of atom.

When you mix elements together these form compounds. The important difference is that as they are a mixture of more than one type of element, they CAN be broken down into more simple substances using chemical means!

As such Hydrogen or Oxygen cannot be simplified chemically (they are therefore elements), however dihydrogen monoxide (H2O or water) is a mixture of these elements that can be broken down using chemical means and so is a compound.

Water is a type of compound . when two elements combine with each other ( hydrogen &oxygen) they forms a compound

Which one of the following statements about absolute zero is correct? (a) At absolute zero, the volume of an ideal gas is zero.
(b) At absolute zero, ideal gases freeze to give solids.
(c) At absolute zero, solid and liquid water are at equilibrium.
(d) Absolute zero is the lowest temperature so far reached in the laboratory