A steel tank of volume is completely filled with oxygen gas at and

CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance

Problem

A steel tank of volume

10.0\,\text{L}

is completely filled with oxygen gas at

35^{\circ}\text{C}

and

3.00\,\text{atm}

. Molar mass of

\text{O}_{2}=32\,\text{g\,mol}^{-1}

. (a) Determine the mass of oxygen present in the tank. (b) The valve is opened and some gas is allowed to escape until the pressure inside falls to

1.00\,\text{atm}

while the temperature remains at

35^{\circ}\text{C}

. Calculate the mass of oxygen that has escaped. (c) Find the volume that the escaped oxygen would occupy at STP.