Question

One gram of a hydrated salt contains Fe=0.2014 gram, S=0.1153 gram, O=0.2301 gram and
rest water of crystallization. Calculate molecular formula of the compound if its vapour density
is 139. Given, atomic weight of Fe=56, S=32.

Answer 1

Explanation:

One gram of a hydrated salt contains Fe=0.2014 gram, S=0.1153 gram, O=0.2301 gram and

rest water of crystallization. Calculate molecular formula of the compound if its vapour density

is 139. Given, atomic weight of Fe=56, S=32.

Answer 2

Answer:

cuso4. 5h2o

Explanation:

persantage of water of crystallization = 100-(25.5+12+25) = 36%

moles of cu 25.6/63.5 = 0.4/0.4=1

moles of s = 12.9/32= 1.6/0.4=4

moles of water =36/18 =2/0.4=5

• formula cuso4. 5h2o

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