number of moles present = molar mass (g) 1 molThe molar mass is the sum of the atomic masses present in a compound. Be sure to take quantity into acount.For intance...the molar mass of H2O is 18.02...
You would take your grams divided by the FW (formula weight) of the molecule. example: 1g of H2O divided by 18 = .056mol H2O you find the formula weight by adding of the atomic masses of each element...
say u get the equation C3H8+5O2 ----> 3CO2 +4H2O
and you know that there is 10.0 mol of C3H8 (propane)
say it asks you for moles of CO2
you would...
10.00molC3H8 x 3 molCO2/1molC3H8
the 3 mol...