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Molecular Formula

Calculate the...

Question

Calculate the mass of $0.5$ moles of helium gas. (Atomic mass of $H e = 4 u$ )

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Solution

one mole of helium gas weighs about its molecular weight that is 4 grams

So 0.5 moles that is half mole of helium gas weighs about half of its molecular weight that is 2g

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2

= 4 u

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300 K

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