Chemical Equations Reivew

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products along with their quantities.

Front

What does the coefficient in a chemical equation represent?

Back

The coefficient indicates the number of molecules or moles of a substance involved in the reaction.

Front

How do you determine the number of atoms in a molecule from its chemical formula?

Back

Count the subscripts for each element in the formula; if there is no subscript, it is assumed to be 1.

Front

What is the chemical formula for water?

Back

H₂O

Front

What is the law of conservation of mass?

Back

The law states that mass is neither created nor destroyed in a chemical reaction; the total mass of reactants equals the total mass of products.

Front

How many hydrogen atoms are in the molecule C₃H₈?

Back

8

Front

What is the chemical formula for glucose?

Back

C₆H₁₂O₆

Front

How many oxygen atoms are in the molecule 2H₂O?

Back

2

Front

What is the chemical formula for ammonia?

Back

NH₃

Front

How many nitrogen atoms are in the molecule (NH₄)₂SO₄?

Back

2