How many grams of CO2 are in 12 mol of the compound?

CO2 has a molecular weight of 12 + (16*2) = 44grams/mol and there are 6.02x10^23 things (such as molecules) / mol. From there it is simple math, but you should do the math. 1.) Figure out the number of moles that you have. 2.) Multiply by Avagadro's number (6.02x10^23)