Question

if molecular formula of certain compound is X4O6.if 5.72 gram X is in 10gram X4O6 then what is the atomic weight of X?

Answer 1

Answer on question # Physics / Atomic and Nuclear Physics

Question if molecular formula of certain compound is X4O6.if 5.72 gram X is in 10gram X4O6 then what is the atomic weight of X?

Solution We can make an equation basing on given chemical formula, that connects atomic weights of elements:

$4m(X)/(4m(X)+6m(O))=5.72/10$

Or, the same:

$4m(X)/6m(O)=5.72/(10-5.72)=5.72/4.28$

We know that m(O) = 16. So we can find m(X).

$2m(X)=3\cdot 16\cdot 1.336=64.15$

$m(X)=32.07$

Probably this is Sulfur, S.