Answer to Question #184420 in General Chemistry for Cathryn Clark

Question

Find the mass of the following gas

175 mL CO2 at 0.711 atm and -3 degrees C

Answer 1

$Mass= Unknown$

$Volume=175ml$ $=0.175L$

$Pressure=0.711atm$

$Temperature=276k$

$0.08206L.atm/K.mol$

From the equation;

$Pv=nRT$

$n=$ $Pv\over RT$

$=$ $(0.711\times 0.175)\over (0.08206 L.atm/K.mol)$

$=5.593\times 10^{-3}$

Mass to grams

$=5.595\times 10^{-3}mol\times 12.0g/mol$

$=0.067g$