How many moles of He are in 16 g of the element?

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How many moles of He are in 16 g of the element?

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Answer 1 · 2017-05-01T02:26:35

$4 moles of He$ $4" moles of He"$

Explanation:

Look at the periodic table and find the molar mass of Helium.

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This tells us that $4.00$ $4.00$ grams of $Helium$ $"Helium"$ equates to $1 mole$ $1" mole"$ . We write it as follows:

$a a a a a a a a a a a a a a a a a \frac{4.00 g He}{1 mole}$ $color(white)(aaaaaaaaaaaaaaaaa)(4.00"g He")/(1" mole")$

If we are given $16 grams$ $16" grams"$ of $He$ $"He"$ , then we can use what we wrote above to figure out number of $moles$ $"moles"$ of $He$ $"He"$ .

$(16cancel"g He")/(1) * (1" mole")/(4.00cancel"g He") = 4" moles of He"$

$"Answer": 4" moles of He"$

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How many moles of He are in 16 g of the element?

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