ashleychan
Active member
 |  Subject: Mole concept (IIT Question) Thu Jun 18, 2009 12:22 am | |
| Sry dat even tho im posting the question in class X even if it is class XII but im now gonna give Icse.
The dot at the endof this sentence has a mass of about one microgram. Assumingthat the black stuff is carbon, calculate the approximate number of atoms of carbon needed to make such a dot (1 microgram = 1 x 10^-6 g).
Try and help me if u can.. |
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ashleychan
Active member
| | Subject: Re: Mole concept (IIT Question) Thu Jun 18, 2009 1:13 am | |
| | Its ok I solved it after a few failed attempts |
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