Question

Helium (He) is a valuable gas used in industry, low-temperature research, deep-sea diving tanks, and balloons. How many moles of He atoms are in 6.46 g of He?

Answer 1

To calculate the number of moles of helium atoms in 6.46 g of He, divide the mass by the molar mass of helium, which is 4.00 g/mol. The result is approximately 1.615 moles.

Step-by-step explanation:

To calculate the number of moles of helium atoms in 6.46 g of He, we need to use the molar mass of helium. The molar mass of helium is 4.00 g/mol. We can use a simple formula to find the number of moles:

moles = mass / molar mass

Using this formula, we can calculate the number of moles:

1. moles = 6.46 g / 4.00 g/mol
2. moles = 1.615 mol

Therefore, there are approximately 1.615 moles of helium atoms in 6.46 g of He.