## Title

PLEASE HELP URGENT
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sarahhughes15
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Joined: 23/12/2010 - 18:22
Posts: 13
PLEASE HELP URGENT

How would i calculate the moles using this equation?

Moles= concentration x volume (dm^3)

i have the following info

concentration of 1.0moldm^-3 which has been calculated using 15cm^3 (in part A of question)

the volume i have now is 25cm^3 for part b

i have been asked to use my concentration of 1.0moldm^-3 from part a

so how would i actually calculate the moles because the volumes are different there is a difference of 10cm^3

would i need to use two calculations or does it involve a subtraction

or would i simply multiply the 1 by 25/1000 although this seems wrong!

please help!

thank you!

chemistrysubjec...
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Joined: 10/06/2007 - 22:31
Posts: 347
Dear Sarah,

Dear Sarah,

From how you have written the question, it is not possible to help you. I can't tell how part A has changed into part B. Although it might be a bit of a pain, it would help me to help you if you wrote the full question out. If you do this, I will try to help you.

Wilson Jasmine
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Joined: 02/06/2012 - 16:03
Posts: 1
Knowledge Is Power

Excellent post and now i am expert to calculate Moles........read more