Question

A chromium chloride salt contains 32.8% metal content by mass. What is its empirical formula?

Answer 1

hello mate..

it means it contains 32.8gm chromium out of 100 gm

so 67.2g chloride is also present

so mole contains = for chromium 32.8/ 52 = 0.63

for chloride = 67.2 / 35.5 = 1.89

so comparable mole :- divide by least mole

for chromium = 0.63/0.63 = 1

for chloride = 1.89 / 0.63 = 3

so empirical mass = Crcl3

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