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# Do you MULTIPLY or DIVIDE when you see the word 'in' ?!! watch

1. Like for instance,
• How many moles of H2Oin 100 m3 ?
3.65 g of HCl in 100 cm3 of solution, what is the concentration?
Like for instance,
• How many moles of H2Oin 100 m3 ?
3.65 g of HCl in 100 cm3 of solution, what is the concentration?
Not sheriff srs. It depends on the information you're given, and then you need to put that information in to the formula you need.

Edit: usually it will be a division though
3. What are the units of conc?

mol dm-3

What does the -3 mean?

x-1 = 1/x

So mol dm-3 = mol / dm3
4. (Original post by Pigster)
What are the units of conc?

mol dm-3

What does the -3 mean?

x-1 = 1/x

So mol dm-3 = mol / dm3
(Original post by richpanda)
Not sheriff srs. It depends on the information you're given, and then you need to put that information in to the formula you need.

Edit: usually it will be a division though
Cheers!

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