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Answer:
X = 5
Explanation:
Total mass here is 1.5g. Now after heating we have a mass of 0.957g Cu. This means heating had caused a loss of 1.5 - 0.957 = 0.543g of water.
Now, we will try to convert this into moles. This can be done by dividing the respective masses by the molar masses. While the mass of water is 18g/mol, the molar mass of CuSO4 is 160g/mol.
The division of the respective masses by the molar masses is thus:
CuSO4 = 0.957/160 = 0.006 moles
H2O = 0.543/18 = 0.03 moles
The ratios of the moles is thus: 0.03/0.006 = 5
Hence, the number of molecules of water of crystallization is 5
This means x = 5
The answer to the question is A
Answer:
The answer is 13.
Explanation:
In an element, proton number is also define as atomic number. So if the element has 13 protons, it's atomic number will be 13.
