How many moles would be represented by 25.0 g of neon (Ne)?
The Correct Answer and Explanation is:
Let’s calculate how many moles are in 25.0 g of neon (Ne).
We use the formula: moles=mass (g)molar mass (g/mol)\text{moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}}moles=molar mass (g/mol)mass (g)
The molar mass of neon (Ne) is approximately 20.18 g/mol.
Now substitute: moles=25.0 g20.18 g/mol\text{moles} = \frac{25.0\ \text{g}}{20.18\ \text{g/mol}}moles=20.18 g/mol25.0 g moles≈1.239 mol\text{moles} \approx 1.239\ \text{mol}moles≈1.239 mol
Answer:
25.0 g of neon represents approximately 1.24 moles (rounded to 3 significant figures).
