A container of volume 0.1 m3 contains air at a temperature of 27 °C and a pressure of…
CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance
Problem
A container of volume 0.1 m3 contains air at a temperature of 27 °C and a pressure of 1.5 MPa.
(1) Calculate the number of moles of air molecules present.
(2) If the molar mass of air is 29 gmole−1 , calculate the mass of the air in the container.
(3) If 20% of the air is made up of oxygen molecules ( O2 ), calculate how many oxygen atoms are present in the container.