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If you fill a balloon with 6.83 grams of helium (He) gas, how many moles of helium are present in the balloon?
Answer: _____ moles (round to 3 sig figs)

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Neetoo

Answer:

1.71 moles of helium are present in balloon

Explanation:

Given data:

Mass of helium = 6.83 g

Number of moles of helium = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of helium = 4 g/mol

by putting values,

Number of moles = 6.83 g/ 4 g/mol

Number of moles = 1.71 mol

Thus, 1.71 moles of helium are present in balloon.

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