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4 g of He = 1 mole.

So, 30.8 g = 7.7 moles

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11y ago
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1w ago

To determine the number of moles in 30.8g of helium, divide the given mass by the molar mass of helium (4g/mol).

( \frac{30.8g}{4g/mol} = 7.7 mol )

There are 7.7 moles in 30.8g of helium.

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Q: How many moles are in 30.8g of helium?
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