Dinitrogen oxide (or nitrous oxide), N20, also known as laughing gas, is widely used as an anesthetic in dentistry.

Question

How many moles are in 27.4 g of dinitrogen oxide?
Express your answer with the appropriate units.

Answer 1

To find the number of moles in 27.4 g of dinitrogen oxide, we need to use the molar mass of N2O.

The molar mass of N2O is calculated by adding the atomic masses of nitrogen (N) and oxygen (O):

Molar mass of N2O = 2(atomic mass of N) + atomic mass of O
= 2(14.01 g/mol) + 16.00 g/mol
= 28.02 g/mol + 16.00 g/mol
= 44.02 g/mol

Now, we can use the molar mass to calculate the number of moles:

Number of moles = Mass / Molar mass
= 27.4 g / 44.02 g/mol
≈ 0.623 mol

So, there are approximately 0.623 moles in 27.4 g of dinitrogen oxide.