Counting Atoms, Classifying and Balancing Equations

Front

How many Hydrogen atoms are in 4H₂O?

Back

8

Front

How many Oxygen atoms are in 2SO₄?

Back

8

Front

What are the reactants in the equation: Fe + S → FeS?

Back

Fe and S

Front

How many Magnesium atoms are in 10MgCl₂?

Back

10

Front

How many HCl molecules do you need to balance the equation: Mg + __HCl → MgCl₂ + H₂?

Back

2

Front

What is the definition of a chemical equation?

Back

A representation of a chemical reaction using symbols and formulas.

Front

What are products in a chemical reaction?

Back

Substances formed as a result of a chemical reaction.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

How do you determine the number of atoms in a compound?

Back

By multiplying the subscript of each element by the coefficient.

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a chemical formula to indicate the number of molecules.