How many moles are there in 52g of helium?

13 moles

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15 moles

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20 moles

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8 moles

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Solution

The correct option is A 13 moles
Molar mass of Helium = 4g
The given mass of Helium = 52g
Thus the number of moles of Helium = $\frac{g i v e n m a s s}{m o l a r m a s s}$
$\frac{52}{4} = 13 m o l e s$

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