How many moles are in "4.555 g He"?

1 Answer
Meave60
Jan 30, 2016

"4.555 g He" contain "1.1380 mol He"."

Explanation:

The molar mass of helium (He) is "4.002602 g/mol" (relative atomic mass on the periodic table in grams/mol), which means that one mole He has a mass of "4.002602 g".

To determine the moles He in "4.555 g He", divide the given mass by its molar mass.

4.555cancel"g He"xx(1"mol He")/(4.002602cancel"g He")="1.1380 mol He"

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