EasyChemistryHigh School (9–10)GeneralAtoms and Molecules › The Mole ConceptNumericalBoard Exam

How many moles are there in 6.6 g of carbon dioxide? And in 110 g of it? Use C = 12 and O = 16.

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How many moles are there in $6.6\ \text{g}$ of carbon dioxide? And in $110\ \text{g}$ of it? Use $\text{C} = 12$ and $\text{O} = 16$ .

Need a reminder? The key ideaShow

One mole holds $N_A = 6.022 \times 10^{23}$ particles. $n = \dfrac{m}{M}$ and $N = n \times N_A$ . To count atoms, multiply the molecules by the atoms in one molecule. The mass of one particle is $\dfrac{M}{N_A}$ .

The worked solution

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How many moles are there in 6.6 g of carbon dioxide? And in 110 g of it? Use C = 12 and O = 16.

The worked solution

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