Issued as a cumulative or non-cumulative L/C, the former allows for unused credit amounts to rollover into subsequent periods while the latter maintains a fixed amount of credit available each period.
average atomic mass of magnesium is 24.3 g/mole so 24.3 X 1.56 X1021 / 6.02 X1023 = .063 grams.
One mole of carbon atoms has a mass of exactly 12 g. Because magnesium atoms each have twice the mass of carbon atoms (24 Mg compared with 12 C), one mole of magnesium has a mass of 24 g. In fact, one mole of any element has a mass in grams that is equal to its relative atomic mass. One mole of iron has a mass of 56 g. Moles of compounds A mole of a molecular compound contains 6 x 10 23 molecules. It has a mass that is equal to its relative formula mass. So a mole of water (H 2 O) has a mass of 18 g. A mole of carbon dioxide (CO 2) has a mass of 44 g.