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Tom [10]
3 years ago
11

How many moles are in 47.5 g of Ca? A.2.85 e 25 B.1.18 mol C. 7.89 e-23 D.1900 mol

Chemistry
1 answer:
docker41 [41]3 years ago
3 0
Okfjchchcjcjjcjccjbfhf
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3 years ago
Perform the following
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Answer:

8.73

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when you are adding or subtracting numbers, the sigfig (significant figure) is based on how many numbers after the decimal. with this info, we can see that 15.67 has 2 sigfigs and 6.943 has 3 sigfigs. when you subtract normally, you would get 8.727, which has 3 sigfigs, so you would round the last 7 up to get 8.73 with 2 sigfigs!

also it is to 2 sigfigs because we know that we go by the least number of sigfigs. hope this helped!

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