Question

the weight of 1×10^22 molecule of cuso4×5H2o is

Answer 1

Given,
 Number of molecules = 1 x 10*22molecules
 Molecular mass of CuSO4.5H2O = 249.72 g/mol
We know that,
 1 mole of CuSO4.5H2O contains 6.023 x 10^23

molecules
Therefore,
 6.023 x 10^23

molecules have a mass of 249.72 g

Hence,
Weight of 1 × 1022 molecules = 249.72 6.023 × 1023× 1 × 1022 = 4.146 g


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Answer 2

hello mate!.....

➡️ According to the mole concept,

➡️ 1 mole of every substance= it's molecular weight= avogadro number of molecules.

➡️ The molecular mass of CuSO4.5H2O = 249.5 g approx., which means

6.022 ×10^23 molecules of it has mass= 249.5g

➡️ So, by unitary method, 10^22 molecules of it has

mass= 249.5/60.22 g = 4.14g


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