Question

Calculate the number of moles of He atoms present in 5.55 g of He.
2

Answer 1

The number of moles of He atoms present in 5.55 g of He is approximately 1.3875 mol.

Step-by-step explanation:

To calculate the number of moles of He atoms present in 5.55 g of He, we need to use the formula:

moles = mass / molar mass

The molar mass of helium (He) is approximately 4 g/mol.

So, the number of moles of He atoms in 5.55 g of He can be calculated as:

moles = 5.55 g / 4 g/mol = 1.3875 mol

Therefore, there are approximately 1.3875 moles of He atoms present in 5.55 g of He.