Chemistry Sem 2 Review

What might happen that indicates a chemical reaction is happening?

• The temperature changes

• A gas is formed

• The mass of the reactants increases

• The color of the substance changes

Tags

NGSS.MS-PS1-2

How does balancing chemical equations relate to the Law of Conservation of Mass?

• It ensures the number of atoms is the same on both sides of the equation

• It increases the mass of the products

• It changes the type of elements present

• It allows for the creation of new atoms

Tags

NGSS.HS-PS1-7

What is oxidation?

• Gain of electrons

• Loss of electrons

• Formation of a precipitate

• Increase in temperature

Tags

NGSS.HS-PS1-1

What is reduction?

• Loss of electrons

• Gain of electrons

• Formation of a gas

• Decrease in temperature

Tags

NGSS.HS-PS1-1

Which of the following is NOT one of the general types of chemical reactions?

• Synthesis

• Decomposition

• Combustion

• Evaporation

How can the activity series for metals be used in predicting chemical reactions?

• It tells you the color of the products

• It helps determine if a metal will react with a given substance

• It shows the melting points of metals

• It lists the boiling points of metals

In a redox reaction, what is the oxidizing agent?

• The substance that loses electrons

• The substance that gains electrons

• The substance that forms a precipitate

• The substance that changes color

What does theoretical yield tell you in a chemical reaction?

• The actual amount of product formed

• The maximum amount of product that could be formed

• The amount of reactant left over

• The percent of reactant used

What is temperature, and how is it related to internal energy?

• Temperature is a measure of the average kinetic energy of particles and is related to internal energy as a component of it.

• Temperature is the total energy of a system and is unrelated to internal energy.

• Temperature is the amount of heat transferred and is not related to internal energy.

• Temperature is the pressure exerted by a gas and is not connected to internal energy.

Tags

NGSS.HS-PS3-2

What does the Maxwell-Boltzmann distribution tell us about the particles in a gas?

• It shows the distribution of speeds among particles in a gas.

• It describes the color of gases.

• It explains the chemical composition of gases.

• It measures the volume of a gas.