Question

find the number of the moles in 48 gram of oxygen​

Answer 1

Molecular Weight of oxygen is 32 g/mol

So, 48 grams of oxygen has (48/32) = 1.5 mol

And 1 mol has 6.023 x 10^23 Molecules of Oxygen.

Then 1.5 mol of Oxygen will contain 9.0345 x 10^23 Molecules of Oxygen.

this is your answer

Answer 2

Hey mate
Here is the answer of above question :

Atomic mass = 16 u
of oxygen
So, molar mass = 16 g
So, 16 g of oxygen contains = 1 mole of oxygen
1g of oxygen contains = 1/16 moles of oxygen
So, 48 gram of oxygen contains = 1/16 * 48
= 3
moles
So, 48 gram of oxygen contains 3 moles
Hope it helps