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.
Magnesium is the ninth most abundant element in the universe. It is synthesized in large, aging stars from the sequential addition of three helium nuclei to a carbon nucleus. Magnesium is flammable, burning at a temperature of approximately 3,100 Â°C (3,370 K; 5,610 Â°F), and the autoignition temperature of magnesium ribbon is approximately 473 Â°C (746 K; 883 Â°F). 2  It produces intense, bright, white light when it burns.