Mole ConceptHard
Question
In an experiment, it is found that 2.0769 g of pure X produces 3.6769 g of pure X2O5. The number of moles of X is
Options
A.0.04
B.0.06
C.0.40
D.0.02
Solution
$\frac{2.0767/A_{x}}{1.6/16} = \frac{2}{5} \Rightarrow A_{x} = 20.769 \times 2.5$
$\therefore\text{ Moles of }x = \frac{2.0769}{20.769 \times 2.5} = 0.04$
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