Question

4.5 gm of an alloy of copper and zinc contains 3.5 gm of copper. What weight of copper will there be in 18.9 gm of the alloy?​

Answer 1

Answer:

Precipitation deficiency

Droughts occur mainly in areas where normal levels of rainfall are, in themselves, low. If these factors do not support precipitation volumes sufficiently to reach the surface over a sufficient time, the result is a drought.

Answer 2

Answer:

Therefore, 14.7 g of copper will there be in 18.9 g of alloy.

Step-by-step explanation:

To Find

If 4.5 g of alloy has 3.5g of copper

18.9 g of alloy = How much gram of copper

Apply Unitary method for this question,

4.5 g of an alloy of copper and zinc contains 3.5 g of copper.

1 g of an alloy of copper and zinc contains 3.5/4.5  g of copper.

• 3.5/4.5= 0.7 g

1 g of an alloy of copper and zinc contains 0.7  g of copper.

18.9 g of an alloy of copper and zinc contains  0.7 * 18.9 g of copper.

• 0.78 * 18.9 = 14.7g

18.9 g of an alloy of copper and zinc contains 14.7 g of copper.

Therefore, 14.7 g of copper will there be in 18.9 g of alloy.