# chemistry

mass of crucible- 26.4574g
mass of crucible and hydrated sample- 27.7617g
mass of hydrated sample 1.3043g
mass of crucible and dehydrated sample- 27.5693g
mass of dehydrated sample- 1.1119g
mass of filter paper- 0.7089g
mass of filter paper and copper- 1.1418g
mass of copper- ?
no. moles of copper- ?
mass of water evolved- ?
no. moles of water- ?
mass of chlorine in sample (by difference)- ?
no. moles of chlorine- ?
mole ratio, chlorine:copper in sample- ?
mole ratio, water:copper in hydrated sample- ?
formula of dehydrated sample (round to nearest integer- ?
formula of hydrated sample- ?

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1. I filled in the empty spots I could but didn't finish. I understand that the chlorine is by difference but I don't know what you did; therefore, I don't know where the chlorine came from.
mass of crucible- 26.4574g
mass of crucible and hydrated sample- 27.7617g
mass of hydrated sample 1.3043g
mass of crucible and dehydrated sample- 27.5693g
mass of dehydrated sample- 1.1119g
mass of filter paper- 0.7089g
mass of filter paper and copper- 1.1418g
mass of copper- 1.1418-0.7089 = 0.4329</b

no. moles of copper- grams/atomic mass = 0.4329/63.54 = about 0.007 but you can do it more accurately.

mass of water evolved- 1.3043-1.1119 = 0.1924

no. moles of water- g/molar mass = 0.1924/18 = about 0.01--again--you redo this

mass of chlorine in sample (by difference)- ?
no. moles of chlorine- ?
mole ratio, chlorine:copper in sample- ?
mole ratio, water:copper in hydrated sample- ?
formula of dehydrated sample (round to nearest integer- ?
formula of hydrated sample- ?

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2. 👎 0

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