Arnott1791 Arnott1791

17-01-2020
Chemistry

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A sample of CaCO3 (molar mass 100. g) was reported as being 30. percent Ca. Assuming no calcium was present in any impurities, the percent of CaCO3 in the sample is:_________.
A. 30%
B. 40%
C. 70%
D. 75%
E. 100%

Respuesta :

abdulismail72 abdulismail72

19-01-2020

Answer:

D.75%

Explanation:

CaCO3 is 40% calcium. therefore if the sample is only 30%calcium, it must only be 3/4 calcium carbonate

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