Question

What is the total sample size (in grams) for a sample of magnesium nitrite which contains 0.92 g of oxygen?

My answer was wrong (32.34g)

Answer 1

Mg(NO2)2 find molar mass or O2 and then convert that to moles and compare the amount of moles in a mole to mole ratio with the other elements in the compound.

Answer 2

Got it =) My mistake was that when i put oxygen into my equ. i forgot that oxygen is a diatomic. So instead of 32 i was using 16. Thanks for the help =)

Answer 3

yea no worries just remember that later on in chem you will hafta do this on a larger scale and the key is to balance the equation first. thats where most people i help go wrong, goodluck.

Answer 4

I'll keep that in mind. thanks