Question

How many moles of carbon are in 3.5 moles of calcium carbonate? ______?

Answer 1

3.5 moles CaCO3 (1 mole carbon/1 mole CaCO3) = 3.5 moles

Answer 2

Answer : The number of moles of calcium carbonate are 3.5 moles.

Explanation : Given,

Moles of carbon = 3.5 mole

The chemical formula of calcium carbonate is, $CaCO_3$

By the mole concept:

In $CaCO_3$, there are 1 mole of calcium (Ca) atom, 1 mole of carbon (C) atom and 3 moles of oxygen (O) atoms.

As, 1 mole of carbon present in 1 moles of $CaCO_3$

So, 3.5 mole of carbon present in 3.5 moles of $CaCO_3$

Hence, the number of moles of calcium carbonate are 3.5 moles.