You are Here: Home

Moles calculation watch

1. I'm a bit stuck on this question

How many moles of atoms are there in 1.00 mol of HNO3?

If you could show me how to work it out, I would greatly appreciate it.
2. (Original post by funkymonster)
I'm a bit stuck on this question

How many moles of atoms are there in 1.00 mol of HNO3?

If you could show me how to work it out, I would greatly appreciate it.
There is no real calculation involved in this, it is simply a fact you need to know.

In 1 mol of any element there are always 6.022 x 10^23 atoms, it's called Avogadro's constant.

So you have to combine the atoms in one mol of H, one mol of N and 3 times the mol of O. Basically avogadro's constant multiplied by 5
3. Moles are creatures that live underground ... they can't do calculations
4. (Original post by Plantagenet Crown)
There is no calculation involved in this, it is simply a fact you need to know.

In 1 mol of any substance there are always 6.022 x 10^23 atoms, it's called Avogadro's constant.

how many atoms are there in 0.100 mol of C3H8?
5. (Original post by funkymonster)
I'm a bit stuck on this question

How many moles of atoms are there in 1.00 mol of HNO3?

If you could show me how to work it out, I would greatly appreciate it.
How many atoms are there in one molecule of HNO3? How many atoms are there in 2 molecules of HNO3? By the same logic, how many moles of atoms are there in one mol of HNO3?

(Original post by Mpagtches)
Moles are creatures that live underground ... they can't do calculations
Unsure if serious.
6. (Original post by funkymonster)

how many atoms are there in 0.100 mol of C3H8?
1 mol = 6.022 x 10^23 atoms

Therefore for 0.1mols, as you've divided it by 10 you also divide the number of atoms by 10, simple maths...
7. (Original post by Plantagenet Crown)
1 mol = 6.022 x 10^23 atoms

Therefore for 0.1mols, as you've divided it by 10 you also divide the number of atoms by 10, simple maths...
One mol doesn't necessarily contain 6.022 x 10^23 atoms.eg. one mol of HCl contains 12.044 x 10^23 atoms.
8. (Original post by morgan8002)
Unsure if serious.
Believe it or not, I actually got a 'clever clogs' badge for that post
9. (Original post by morgan8002)
One mol doesn't necessarily contain 6.022 x 10^23 atoms.eg. one mol of HCl contains 12.044 x 10^23 atoms.
Yes I should have been clearer, by any substance I was referring to any element, in which a mol always equals the same number of atoms
10. (Original post by Mpagtches)
Moles are creatures that live underground ... they can't do calculations
Can't believe you got a badge for that
11. (Original post by Mpagtches)
Believe it or not, I actually got a 'clever clogs' badge for that post
Hats = off.
12. (Original post by morgan8002)
One mol doesn't necessarily contain 6.022 x 10^23 atoms.eg. one mol of HCl contains 12.044 x 10^23 atoms.
can you please explain to me how you get 12.044 x 10^23. i am bad at these calculations
13. (Original post by djmans)
can you please explain to me how you get 12.044 x 10^23. i am bad at these calculations
1 mol of any element = 6.022 x 10^23 atoms.

And HCl is made up of 2 elements, Hydrogen and Chlorine. Therefore if you have 1 mol of HCl you have 1 mol of H, and 1 mol of Cl, so it's Avogadro's constant multiplied by 2.
14. (Original post by Plantagenet Crown)
1 mol of any element = 6.022 x 10^23 atoms.

And HCl is made of of 2 elements, Hydrogen and Chlorine. Therefore if you have 1 mol of HCl you have 1 mol of H, and 1 mol of Cl, so it's Avogadro's constant multiplied by 2.
thanks
15. How many moles in 700 tonnes of iron?

Posted from TSR Mobile
16. (Original post by turquoisecat)
How many moles in 700 tonnes of iron?

Posted from TSR Mobile
Convert tonnes to grams and then divide that by iron's molar mass.
17. Thanku

Posted from TSR Mobile

Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: September 24, 2015
Today on TSR

Thought he was 19... really he's 14

University open days

Wed, 25 Jul '18
2. University of Buckingham
Wed, 25 Jul '18
3. Bournemouth University