Question

How many grams are in 2.5 moles of Carbon

Answer 1

Carbon's atom mass is 12. So 1 mole of Carbon is 12 grams. We should multiply
12 by 2.5:

`2.5\quad =\quad \frac { 5 }{ 2 } \\ 12\cdot \frac { 5 }{ 2 } \\ \frac { 60 }{ 2 } \\ 30\\`

Answer 2

According to the periodic table, carbon's molar mass is 12.011 grams per mole (that's the small number under the element). So, just multiply like this to get the answer:


`(2.5\ mol\ C)((grams\ C)/(12.011\ mol\ C))=0.20814\ g\ C`

So, there are approximately 0.208 grams in 2.5 moles of carbon.