What volume of 0.100 m naoh is required to precipitate all of the nickel (ii) ions from 150.0 ml of a 0.244 m solution of ni(no3)2?

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?