Practice Calculating Molar Masses

As a review you calculate the molar mass by going to the periodic table of elements (www.webelements.com) and rounding the atomic mass of each element to the nearest whole value (except for Cl, which is always 35.5) If there are more than one of an element than you multiply its molar mass by however many there are (ex. H2 = 1*2 = 2) Finally you add molar masses for each element or elements together and this is the molar mass of the compound.Go to Answer Key for Practice with Molar Masses to compare your answers

1. CO2


2. HNO3


3. CCl4


4. Na2SO4


5. C12H22O11

created by Faiz Khan