Question

2.4.PS-10 Question Help In a certain chemical, the ratio of zinc to copper is 4 to 17. A jar of the chemical contains 578 grams of copper. How many grams of zinc does it contain? It contains grams of zinc

Answer 1

we have the following ratio:

$\frac{ZINC}{COOPER}=\frac{4}{17}$

Now, we know that there are 578 gr of cooper. By substituting this values into our ratio, we have

$\frac{ZINC}{578}=\frac{4}{17}$

and we must isolate ZINC. This can be done by moving 578 to the right hand side:

$\begin{gathered} \text{ZINC}=578\cdot\frac{4}{17} \\ \text{ZINC}=\frac{578\cdot4}{17} \\ \text{ZINC}=\frac{2312}{17} \\ \text{ZINC =136} \end{gathered}$

that is, the jar contains 136 gr of zinc