Easy 55
Easy 55
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How many oxygen atoms are in 1.55 ng of Ca3(PO4)2? EASY TEN POINTS?
Please help me!
It is not mg, it is ng.
if you mean mg rather than ng, then:
.00155g x 1mol/310g = 5x10^-6 mol
5x10^-6 mol Ca3(PO4)2 x 8 mol O / 1 mol Ca3(PO4)2 = 4.0x10^-7mol O
4.0x10^-7 mol O x 6.0223x10^23 atoms/mol = 2.409x10^17 atoms O