How many moles of N are in 0.205 g of N2O ?

Answer 1

Howdy Bri!

So yet again, we find ourselves doing math when we thought the class was chemistry! For this we're going to do a standard conversion that we do a lot in GenChem, converting from grams to moles.

In this case, we're starting with 0.205g N₂O. Let's go ahead and convert that to moles by using the molar mass, which is 44.013 g/mol.

.205 g N₂O * (1 mol N₂O / 44.013 g N₂O) = 0.00466 mol N₂O

So we got to moles of dinitrogen monoxide - now we need to know how many moles of nitrogen! We see that there's a subscript of 2 after the N, meaning there are two moles of N for every mol of N₂O. You can think of it in terms of food -- for every 1 sandwich, there are two pieces of bread.

So let's multiply the number of moles of N₂O by 2, to get moles of N!

.00466 mol N₂O * ( 2 mol N / 1 mol N₂O) = .00932 mol N!

Hope that helps :)

-Niral