Mole ConceptMedium
Question
The mass composition of universe may be given as 90% H2 and 10% He. The average molecular mass of universe should be
Options
A.2.20
B.2.10
C.3.80
D.3.64
Solution
$\frac{100}{M} = \frac{90}{2} + \frac{10}{4} \Rightarrow M = 2.105$
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