How do you write a chemical equation from only words? I don't understand how you can take a worded problem and convert it into coefficients and elements. I know how to solve a chemical equation, but I'm stuck on converting words to an equation.

When a chemist collects hydrogen gas over water, she ends up with a mixture of hydrogen and water vapor in her collecting bottle. if the pressure in the collecting bottle is 97.1 kilopascals and the vapor pressure of the water is 3.2 kilopascals, what is the partial pressure of the hydrogen?