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what's the concentration of a solution

if you're given the number of moles and

the volume now the answer is C

concentration equals n over V take the

number of moles and divide it by the

volume in this case the number of moles

is 0.7 and the volume is 400 milliliters

now to get that in liters you're going

to want to divide by a thousand I get

0.4 and so that volume is 0.4 liters on

your calculator point seven divided by

0.4 I get 1.75 and my units are moles

per liter your teacher may prefer you to

write moles per liter a different way

it's exactly the same thing as saying

1.75 molar

it's just another unit chemist AB but

again to calculate concentration take

the number of moles you have divided by

the volume you have in liters best of

luck