Question

The weight of 1 × 10²² molecules of CuSO₄.5H₂O is ...............

Answer 1

Given : weight of molecules 1× 10 raised to 22 (molecules are CuSO 4 . 5 H 2O )

in scientific language . means sin of into

So , CuSO 4 × 5H2O = H2SO4 + Cu + O ( g)

Answer 2

Answer:

Given,

Number of molecules = 1 x 10^22 molecules

Molecular mass of CuSO4.5H2O = 249.72g/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 249.72g

Hence,

Weight of 1 × 10^22 molecules =

(249.72/6.023 ×10^23)× 1 × 10^22 = 4.146 g

Explanation:

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