Chemistry Exam Review #2

Front

What is nuclear fission?

Back

Nuclear fission is a nuclear reaction in which the nucleus of an atom splits into two or more smaller nuclei, along with the release of energy.

Front

What is the chemical name for HCl (aq)?

Back

Hydrochloric acid.

Front

What is the balanced equation for the decomposition of water?

Back

2H₂O (l) → 2H₂ (g) + O₂ (g)

Front

What is the mass of water required to produce 22.4 L of oxygen at STP?

Back

36 g of H₂O.

Front

What is the name of the compound PbO₂?

Back

Lead(IV) oxide.

Front

How does increasing the surface area of reactants affect reaction speed?

Back

Increasing surface area enables more reactant particles to collide, thus increasing the reaction speed.

Front

What is the definition of a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What is the difference between fission and fusion?

Back

Fission is the splitting of a heavy nucleus, while fusion is the combining of light nuclei to form a heavier nucleus.

Front

What is STP in chemistry?

Back

STP stands for Standard Temperature and Pressure, which is 0 degrees Celsius and 1 atmosphere of pressure.

Front

What is the formula for calculating the number of moles?

Back

Number of moles = mass (g) / molar mass (g/mol).