A helium balloon contains 0.54g of helium.
Given the molecular weight of helium is 4.0 g/mol, how many moles of helium does it contain?
0.135molHe
4.0 g/1mole = .54 g/x mole
This is a proportion.
Cross multiply to find the answer
To find the number of moles of helium in the balloon, we can use the formula:
Number of moles = Mass of substance / Molecular weight
Given:
Mass of helium = 0.54 g
Molecular weight of helium = 4.0 g/mol
Substituting the values into the formula:
Number of moles = 0.54 g / 4.0 g/mol
Calculating this:
Number of moles = 0.135 mol
Therefore, the helium balloon contains 0.135 moles of helium.
To find the number of moles of helium in the balloon, you need to use the formula:
Number of moles = Mass of substance / Molecular weight
In this case, the mass of helium is given as 0.54g, and the molecular weight of helium is 4.0 g/mol.
Number of moles = 0.54g / 4.0 g/mol
Calculating this, we get:
Number of moles = 0.135 mol
Therefore, the helium balloon contains 0.135 moles of helium.