how to calculate mass of CO2 when occupy 11cm3 volume?

Answer 1

if you assume STP in this scenario that means that you have

11 cm^3 x 1 L / 1000 cm^3 = 0.011 L

0.011 L / (22.4 L/mol) = 0.00049 mol

then you can convert that over into a mass by multiplying by the molar mass

0.00049 x 44.01 g/mol = 0.022 g

so under standard conditions, the mass of 11 cm^3 of CO₂ is approximately 0.022 g

Answer 2

Use the density of CO₂, which is 0.001836 g/cm³ by solving for mas in the equation:

D = m/v

Rearranging the equation, it becomes:

m = D*v = 0.001836 g/cm³ * 11 cm³ = 0.020196 g