Question

3) a. How many atoms are in 7.13 mol of carbon-12?b. How many grams does this much carbon-12 weigh?

Answer 1

`\begin{gathered} a)\text{atoms of }C=4.29*10^(24)atoms \\ b)\text{ 85.56g} \end{gathered}`

Explanations:

a) Given the following parameter from the question

Mole of carbon-12 = 7.13 moles

Using the conversion rate

1 mole = 6.02 * 10²³ atoms

Determine the atoms of carbon-12:

`\begin{gathered} \text{atoms of }C=7.13*6.02*10^(23)\text{ atoms} \\ \text{atoms of }C=42.9226*10^(23)atoms \\ \text{atoms of }C=4.29*10^(24)atoms \end{gathered}`

b) In order to determine the grams of carbon-12, the expression below will be used:

`\begin{gathered} \text{Mass}=\text{Mole}*\text{molar mass} \\ \text{Mass of C=7.13moles}*(12g)/(mol) \\ \text{Mass of C=}85.56grams \end{gathered}`

Hence the number of grams the carbon-12 weigh is 85.56 grams