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Chemistry

Answered

What is the mass of 12.3 moles of helium (He)?

0.325 g He
3.07 g He
49.2 g He
74.0 g He

Answer :

cristisp93 cristisp93

Today at 1:00 PM

49.2 g of helium

Explanation:

To find the mass of a particular compound or element we use the following formula:

number of moles = mass / molecular weight

mass = number of moles × molecular weight

mass of helium = 12.3 (moles) × 4 (g/mole) = 49.2 g

Learn more about:

moles number

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