Question

A helium balloon contains 0.50 g of helium. How many moles of helium does it contain?

Answer 1

So, the helium balloon contains 0.125 moles of helium.

Step-by-step explanation:

To find the number of moles of helium in a sample, you can use the molar mass of helium and the given mass of helium in the sample.

The molar mass of helium (He) is approximately 4.00 grams per mole (g/mol).

Given: Mass of helium = 0.50 grams (g)

Now, you can use the formula:

Number of moles (n) = Mass (m) / Molar mass (M)

Number of moles of helium = 0.50 g / 4.00 g/mol

Number of moles of helium = 0.125 moles

So, the helium balloon contains 0.125 moles of helium.