KSP2013777 wrote:Somebody can help me to know my understanding correct or not?
Question - Is the number of atoms in 0.5 mol of oxygen gas and 0.5 mol of iron the same?
I think answer is not correct because Oxygen gas is made up of molecules (O2)
That means, 0.5 mol of oxygen gas have 0.5 x 2 x 6 x 10^23 = 6 x 10^23 oxygen atoms.
But, 0.5 mol of iron have 0.5 x 6 x 10^23 = 3 x 10^23 iron atoms.
So, answer is no, am I right? pls ans when u hv time.
Yes, you are right. The key word in the question is ATOMS. not molecules not ions. Oxygen itself is made up of two atoms since it is diatomic and you have to take that into consideration.