To find the number of moles of helium in 6.46g of He, divide the given mass by the molar mass of helium. In this case, there are approximately 1.61 moles of Helium in 6.46g of He.
To calculate the number of moles of helium in 6.46g of He, you can use the formula:
Moles of Helium = (Given Mass of He) / (Molar Mass of He)
Given that the molar mass of helium (He) is approximately 4.003 g/mol, you can calculate:
Moles of Helium = 6.46g / 4.003 g/mol = 1.61 moles of Helium.
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