Question

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The mass of 1 × 10²² molecules of CuSO4 is..........?​

Answer 1

Answer :

• Mass = 4.14 g.

Step-by-step explanation :

Given that,

• $\rm{There\:are\:1\times{}10^{22}\:molecules\:of\:CuSO_4.5H_2O.}$

$\hrulefill$

$\rm{Molar\:mass\:of\:CuSO_4.5H_2O}$ =

$\implies\rm{(63.5+32+64+90)g\:mol^{-1}}$

$\implies\rm{249.5\:g\:mol^{-1}}$

$\rm{So,\:mass\:of\:6.02\times{}10^{23}\:molecules\:of\:CuSO_4.5H_2O}$

$\implies\rm{249.5\:g}$

$\rm{\therefore\:mass\:of\:1\times{}10^{22}\:molecules\:CuSO_4.5H_2O=}$

$\implies\rm{\dfrac{249.5\times{}1\times{}10^{22}}{6.02\times{}10^{23}}}$

$\implies\bold{4.14\:g}$

Answer 2

Answer:

1 mole of CuSO4. 5H2O (249.5grams) contains Avogadro number of molecules. here the answer is 4.158 grams.