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2.25 mol He

2.25 mol He
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Answer #1

Since 1 mol of any compound = Molar mass = Avagadro's number

For He = 1 mol He = 4.0 g He = 6.023*1023 number of He atoms

             2.25 mol He = (2.25 mol)(4.0 g He) = 6.023*1023 (2.25)

                               = 9 mol He = 1.355*1024 atoms

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