Turn on thread page Beta
 You are Here: Home

# Moles/Avogadro's Number watch

1. I done this question in class the answer the teacher said is different from what I got.
The question was:
How many sulfite ions are present in 2.1g of anhydrous sodium sulfite?

My answer was 2.00 x10^23.
Is this correct?
2. (Original post by ozmo19)
I done this question in class the answer the teacher said is different from what I got.
The question was:
How many sulfite ions are present in 2.1g of anhydrous sodium sulfite?

My answer was 2.00 x10^23.
Is this correct?
No, it should be 1.00 x 1022
3. Work out how many moles there are in 2.1g of sodium sulfite, so 2.1 divided by the Mr of sodium sulfite. Then you know how many moles you have. Then multiply the avargadro constant by the number of moles you have.
4. (Original post by charco)
No, it should be 1.00 x 1022
I had this answer wrote down and I multiplied it by 2 by mistake.
Thanks

Turn on thread page Beta

### 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 12, 2015
Today on TSR

### He lied about his age

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

### University open days

1. University of Bradford
Wed, 25 Jul '18
2. University of Buckingham
Psychology Taster Tutorial Undergraduate
Wed, 25 Jul '18
3. Bournemouth University
Clearing Campus Visit Undergraduate
Wed, 1 Aug '18
Poll

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE