1 Molecule of MgCl2 = 95.11
1 Mole in 1 molecule of MgCl2 is
1
95.11
= 0.010514
Or Total moles in 309 gm of MgCl2 is #0.010514*309 = 3.2488
Answer is 3.2488 moles
Earth's atmosphere is 78%<span> nitrogen </span>21%<span> oxygen, </span>0.9%<span> argon, and </span>0.03%<span> carbon dioxide with very small percentages of other elements.
hope it helps</span>
