Answer:
A) <u><em>Dinitrogen Oxide:</em></u>
=>
(Also called Nitrous Oxide)
B) <u><em>Calcium Dihydrogen Phosphate:</em></u>
=>
(Also called Monocalcium phosphate)
One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.