0.750 mol of NaCl is dissolved into 150.0 grams of pure water. What is the mole fraction of NaCl?

0.100mole of sodium chloride [ NaCl] is dissolved into 100 grams of pure water H2O. What is the mole fraction of sodium chloride [ NaCl]?

a solution contains 0.284 mol of NaCl dissolved in 6.18 mol ofwater.

1) What is the mole fraction of NaCl?

2) what is the molality of the solution? .....m

The vapor pressure of pure water (H2O) at 30 oC is 40 torr. If salt (NaCl) is dissolved into a sample of water until the total vapor pressure of the mixture at 30 oC is 32 torr, what is the mol fraction of salt?