Chemical Reactions Review

Front

What does the Law of Conservation of Mass state?

Back

Matter cannot be gained or lost in a chemical reaction.

Front

If an element is diatomic, what should its subscript be?

Back

2, only when it is an element.

Front

How do you balance the equation: _CF4 + _Br2 -- _CBr4 + _F2?

Back

1,2,1,2.

Front

What are the products of the Single Replacement reaction: Mg + CuCl?

Back

MgCl2 + Cu.

Front

What are the products of the reaction: C2H4 + O2 → ?

Back

CO2 + H2O.

Front

Define a chemical reaction.

Back

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

Front

What is a reactant in a chemical reaction?

Back

A substance that takes part in and undergoes change during a reaction.

Front

What is a product in a chemical reaction?

Back

A substance that is formed as the result of a chemical reaction.

Front

What is the difference between a single replacement reaction and a double replacement reaction?

Back

In a single replacement reaction, one element replaces another in a compound; in a double replacement reaction, the ions of two compounds exchange places.

Front

What is the role of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in a reaction.