What is the molar mass of a gas if 0.181 g of the gas occupies a volume of 125 mL at a temperature of 122°C and a pressure of 776 torr?

> b takes place in the gas phase in an isothermal tubular reactor. the feed is one mole of a per one mole of c, an inert. the entering temperature and pressure are 427°c and 10 atm, respectively. the gas constant r = 0.08206 atm · l/mol · k.

im doing test rn im going with 2 but ill give answer if itss wrong,   : )