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vodomira [7]
3 years ago
10

a student performed an analysis of a sample for it's calcium content and got the following results: 14.92%, 14.91%, 14.88%, 14.9

1%. The actual amount of calcium in the sample is 15.70%. What conclusion can you draw about the accuracy and precision of these results?
Chemistry
1 answer:
kramer3 years ago
5 0
The question is asking to state the conclusion that can be formulated, base on the problem or the given analysis of the data, about the accuracy and precision  and base on my research, i would say that the Accuracy is Poor but the Precision is Good. I hope this would help you 
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Answer:

The number of moles of the gas is 9.295 moles or 9.30 moles

Explanation:

We use PV = nRT

Where P = 4.87 atm;

V = 67.54 L

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T = 158 C = 158 +273 K = 431 K

the number of moles can be obtained by substituting the values in the respective columns and solve for n

n = PV / RT

n = 4.87 * 67.54 / 0.0821 * 431

n = 328.9198 / 35.3851

n = 9.295moles

The number of moles is approximately 9.30moles.

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PtichkaEL [24]

Answer:

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