What is the density of carbon dioxide at STP? (C=12.01g/mol; O=16.00g/mol) Chemistry Gases Molar Volume of a Gas 1 Answer Jane · Stefan V. Mar 4, 2018 Answer: #"0.00195 g/cm"^3# Explanation: The molar mass of #CO_2# is #"12.01 g/mol" + 2*"16 g/mol" = "44.01 g/mol"# At S.T.P, the molar mass of #CO_2# occupies #"22.4 L" = "22400 cm"^3#, i.e. #"1 mol"# occupies #"22400 cm"^3# So, the density of #CO_2# at S.T.P is #= "44.01 g"/("22400 cm"^3) = "0.00195 g/cm"^3# Related questions How do stoichiometric ratios relate to molar volume of a gas? How do you calculate molar volume of a gas at STP? How do you find the molar volume of hydrogen gas? How do you calculate molar volume of oxygen gas? What is molar gas volume? What is the volume at 0 °C and 1 atm of a mixture that contains 4.0 g of methane and 2.0 g of helium? What is the difference between STP and NTP? What is the volume of .25 moles of oxygen (O2) Gas? Why would knowing the molar volume of a gas be important? Why is 22.4 liters called the molar volume of a gas? See all questions in Molar Volume of a Gas Impact of this question 325 views around the world You can reuse this answer Creative Commons License