Please help me with the following questions!

N2 + 3H2 -----> 2NH3

In the equation above the left hand side (N2 + 3H2) is called the
Subscript
Product
Reactant
Coefficient
In the equation above the right hand side (2NH3) is called the
Subscript
Product
Reactant
Coefficient
In the equation above the big 2 in front of NH3 is an example of a
Subscript
Product
Reactant
Coefficient
In the equation above the little 2 that comes to the right of the N and the H is an example of a
Subscript
Product
Reactant
Coefficient

The equation shown below is an example of what type of chemical reaction?
Fe + CuSo4 -----> Cu + FeSo4
Synthesis/Combination
Decomposition
Single replacement
Double replacement

The equation shown below is an example of what type of chemical reaction?
C+CO2 -----> 2CO2
Synthesis/Combination
Decomposition
Single replacement
Double replacement

The equation shown below is an example of what type of chemical reaction?
K2SO4 + Ba(NO3)2 -----> 2KNO3 + BaSO4
Synthesis/Combination
Decomposition
Single replacement
Double replacement

The equation shown below is an example of what type of chemical reaction?
2HgO ----> 2Hg + O2
Synthesis/Combination
Decomposition
Single replacement
Double replacement

Why do chemists use symbols to describe chemical reactions instead of just using words?

1) a. Reactant
b. Product
c. Coefficient
d. Subscript

2) Single Replacement

3) Synthesis/Combination

4) Double Replacement

5) Decomposition

Chemists use symbols because words are long and tedious.