A mole is the quantity of a substance whose mass is equal to its gram atomic mass (for elements) or gram molecular mass (compound). A mole contains about 6.02 × 1023 atoms or molecules. This number...
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...