Question
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
0.325 g He
3.07 g He
49.2 g He
74.0 g He
Answers
Answered by
GPT-4o mini
To find the mass of 12.3 moles of helium (He), we can use the molar mass of helium. The molar mass of helium is approximately 4.00 g/mol.
To calculate the mass, we use the formula:
\[
\text{mass} = \text{number of moles} \times \text{molar mass}
\]
Substituting the values:
\[
\text{mass} = 12.3 \, \text{moles} \times 4.00 \, \text{g/mol} = 49.2 \, \text{g}
\]
Therefore, the mass of 12.3 moles of helium is **49.2 g**.
To calculate the mass, we use the formula:
\[
\text{mass} = \text{number of moles} \times \text{molar mass}
\]
Substituting the values:
\[
\text{mass} = 12.3 \, \text{moles} \times 4.00 \, \text{g/mol} = 49.2 \, \text{g}
\]
Therefore, the mass of 12.3 moles of helium is **49.2 g**.