You can measure how much of something you have by counting individual objects. for example, you can count the number of cookies in a bag or the number of pages in your notebook. there is a name for a number of atoms, ions, or molecules. one mole of a substance is equal to 6.02 x 10^23 atoms, ions, or molecules of that substance. you can determine the number of moles in a substance by obtaining the mass of the substance.

objectives
• to measure the masses of common compounds and objects
• to calculate the moles and atoms from the experimental masses

a. salt(nacl)
b. sugar(c6h22o11)
c. chalk(caco3)
d. sand(sio2)
e. water(h2o)
f. balance
g. spoon