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zimovet [89]
1 year ago
8

How many moles of water form

Chemistry
1 answer:
lubasha [3.4K]1 year ago
4 0
That answer is 2.12 mol H2O

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A student has a 2.123 g sample of a hydrated salt. she heats it to drive off all the water. after heating to constant mass, the
morpeh [17]
The mass of hydrated salt - 2.123 g
mass of anhydrous salt - 1.861 g
mass that has been reduced is the mass of water that has been heated and lost from the compound thereby making the salt anhydrous.
therefore mass of water lost - 2.123 - 1.861 = 0.262 g
number of moles of water lost - 0.262 g / 18 g/mol = 0.0146 mol 
number of moles of salt - 1.861 g / 380.6 g/mol = 0.00490 mol 
molar ratio of moles of water to moles of salt 
molar ratio = 0.146 mol / 0.00490 mol = 2.98 rounded off to 3
for every 1 mol of salt there are 3 moles of water
therefore empirical formula - Cu₃(PO₄)₂.3H₂O


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The process by which nitrogen gas is converted to a usable form is called nitrogen
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Copper, because it is the only metal out of all of them.

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Which of the following statements correctly describes the relationship between volume and temperature( moles and pressure of gas
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Please help!! I was sick when he went over this
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