In the future, clean energy sources, such as solar power, may be used to create hydrogen fuel.

a. True

b. False

What is meant by radioactivity? high-energy subatomic particles disintegration of the nucleus unstable atoms all of the above

Which particle of the atom has no charge? a. neutron b. electron c. nucleus d. proton

Which of the following electromagnetic waves has the highest energy?

Subatomic particle that has mass nearly equal to that of a proton, but carries no electrical charge

Select the correct answer. When a perfume bottle is opened, some liquid changes to gas and the fragrance spreads around the room. Which sentence explains this? A. Gases do not have a definite volume. B. The particles of gases are closely packed. C.

O2 + CS2 → CO2 + SO2 Which of the following shows the equation balanced?

Convert 970. mm Hg to atm.

The addition of a catalyst in a chemical reaction (A) increases the concentration of products at equilibrium. (B) increases the fraction of reactant molecules with a given kinetic energy.

Is fire hot or cold?

In Flask A, you reacted 7.23 g Mg with 1.05 mol HCl. In Flask B, you reacted 1.22 g Mg with 1.35 mol HCl. Which balloon will inflate the most?