Chemistry Chemical Reactions Intro and Balancing HW

Front

What type of reaction is photosynthesis?

Back

Endothermic reaction, as it absorbs energy from sunlight.

Front

Balance the reaction: NaClO3 --> ? NaCl + ? O2

Back

2 NaClO3 --> 2 NaCl + 3 O2.

Front

Balance the reaction: H2O2 --> ? H2O + ? O2

Back

2 H2O2 --> 2 H2O + O2.

Front

What is evidence of a chemical reaction?

Back

Fizzing is evidence of a chemical reaction.

Front

If energy is on the reactant side of a chemical equation, what type of reaction is it?

Back

Endothermic reaction.

Front

Define a chemical reaction.

Back

A process where reactants transform into products, involving the breaking and forming of bonds.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is an exothermic reaction?

Back

A reaction that releases energy, usually in the form of heat.

Front

What is an endothermic reaction?

Back

A reaction that absorbs energy from its surroundings.

Front

What are reactants in a chemical reaction?

Back

Substances that undergo change during a chemical reaction.