11 grade chemistry others
Calculate the number of moles of helium present in 52 g of helium.A.) 0.050B.) 13C.) 1.0D.) 1.5E.) 2.0
Calculate the number of moles of helium present in 52 g of helium.A.) 0.050B.) 13C.) 1.0D.) 1.5E.) 2.0
1 Answer
Askiitians Tutor Team
To find the number of moles of helium in 52 grams of helium, follow these steps:
1. **Determine the molar mass of helium.**
- Helium (He) has an atomic mass of approximately 4 grams per mole.
2. **Use the formula for calculating moles:**
\[
\text{Number of moles} = \frac{\text{Mass of the substance (in grams)}}{\text{Molar mass (in grams per mole)}}
\]
Here, the mass of helium is 52 grams, and the molar mass of helium is 4 grams per mole.
\[
\text{Number of moles} = \frac{52 \text{ grams}}{4 \text{ grams per mole}} = 13 \text{ moles}
\]
So, the number of moles of helium in 52 grams of helium is **13**.
The correct answer is **B) 13**.
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