Question

calculate the number of molecules present in 22g of carbondioxide

Answer 1

relative molevular mass of co2 is 44.(O=16,C=12).so the number of atoms in 44g is 6.022×10^23(avegadro constant).therefore the number ofcarbon atoms in 22g is 6.022×10^23/2.as in one atom there is only one atom of carbon. 22 g of CO2, divided by 44 g/mole of CO2 means there are 0.50 mole of CO2.