A weighed quantity of a gas is collected over water at `25^(@)C` and 742 mmHg. The molar mass of the gas is to be determined at standard temperature and pressure. If the vapor pressure of water is ignored during the calculation, what is the effect on the calculated pressure and calculated molar mass of the gas?

Options

A. `{:("Pressur","Molar mass"),("low","low"):}`
B. `{:("Pressur","Molar mass"),("low","high"):}`
C. `{:("Pressur","Molar mass"),("high","low"):}`
D. `{:("Pressur","Molar mass"),("high","high"):}`

Answer

c