Question

How many grams of carbon can be obtained from 127 g of DEET, C12H17NO?

Answer 1

`\large \boxed{\text{95.7 g}}`

Step-by-step explanation:

The formula of DEET — DiEthyl-m-Toluamide — is C₁₂H₁₇NO.

The masses of the atoms in 1 mol of DEET are

`\begin{array}{crrr}\textbf{Atom} &\textbf{MM/g} & \textbf{No}. &\textbf{m/g}\\\text{C} &12.01 & 12 & 144.12\\\text{H} & 1.01 & 17 & 17.14\\\text{N} & 14.01 & 1 & 14.01\\\text{O} & 16.00 & 1 & 16.00\\\ & &\text{TOT = } & \mathbf{191.27}\\\end{array}`

Thus, there are 144.12 g of carbon in 191.27 g of DEET.

`\text{Mass of C} = \text{127 g DEET} * \frac{\text{144.12 g C}}{\text{191.27 g DEET}} = \textbf{95.7 g C}\\\\\text{There are $\large \boxed{\textbf{95.7 g}}$ of C in 127 g of DEET}`