Question

In a certain​ chemical, the ratio of zinc to copper is 4 to 17 . A jar of the chemical contains 663 of copper. How many grams of zinc does it​ contain?

Answer 1

The jar contains 156 grams of zinc

Explanation:

Ratios

Let's call

Z=gr of zinc

C=gr of copper

We know the ratio between them in a certain chemical is:

`\displaystyle (Z)/(C)=(4)/(17)`

The jar of the chemical contains C=663 gr of copper. Calculate the grams of zinc by solving the above relation for Z:

Multiplying by C:

`\displaystyle Z=(4)/(17)\cdot C`

Substituting the value of C:

`\displaystyle Z=(4)/(17)\cdot 663`

Z=156 gr

The jar contains 156 grams of zinc