# How do you write a chemical formula for the following scenario: Nitric acid is a component of acid rain that forms when gaseous nitrogen dioxide pollutant reacts with gaseous oxygen and liquid water to form aqueous nitric acid?

Jun 16, 2016

"4NO"_2("g")+"O"_2("g")+"2H"_2"O("l")$\rightarrow$"4HNO"_3("aq")

#### Explanation:

This is a synthesis reaction, also called a combination reaction, because two or more reactants produce a single product. You essentially have been given a word equation, which does not give the chemical formulas of each substance. In order to write a chemical equation, you need to determine the chemical formulas of each substance. Then write the equation and balance it.

Reactants
Gaseous nitrogen dioxide: "NO"_2("g")
Gaseous oxygen: "O"_2("g")
Liquid water: $\text{H"_2"O"(l)}$

Product
Aqueous nitric acid: "HNO"_3("aq")

Balanced Equation

"4NO"_2("g")+"O"_2("g")+"2H"_2"O("l")$\rightarrow$"4HNO"_3("aq")