The density of liquid carbon dioxide at 25°C is 0.89×103kgm−3 How large(mL) a cartridge of liquid carbon dioxide must be provided to inflate a life jacket of 5 litre capacity at NTP.

Mol. wt. of CO2=44g5LCO2 at NTP. weighs =44g22.4L×5L=9.82g∴ wt. of CO2=9.82g=0.00982kgDensity of CO2  d=wv= 0.89×103kgm−3∴ Volume of cartridge containing  0.00982kgCO2= Mass  density =0.00982kg0.89×103kgm−3=1.1×10−5m3=1.1×10−5×106=11mL