LFinal answer:
A chemical's ratio of zinc to copper is 3:16, and there are 720 grams of copper in a jar. By calculating the total parts and dividing the weight of copper by the number of copper parts, we find each part weighs 45 grams. Multiplying by the number of zinc parts (3), we conclude there are 135 grams of zinc in the jar.
Step-by-step explanation:
The student's question concerns the ratio of zinc to copper in a chemical and how to determine the amount of zinc given a certain amount of copper. To solve this, we can use the ratio of zinc to copper which is given as 3:16. This means for every 3 parts of zinc, there are 16 parts of copper. Based on the provided information, there are 720 grams of copper in the jar.
First, let's find the total parts in the ratio:
- 3 parts zinc
- 16 parts copper
Total parts = 3 + 16 = 19 parts
Now, we determine how much each part weighs:
Weight of each part = Total weight of copper / Number of copper parts
Weight of each part = 720 grams / 16
Weight of each part = 45 grams
Lastly, we calculate the weight of zinc:
Weight of zinc = Weight of each part * Number of zinc parts
Weight of zinc = 45 grams * 3
Weight of zinc = 135 grams
Therefore, the jar contains 135 grams of zinc, which corresponds to option B.