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Calculate the formula unit mass of Na2S2O3 and cuSO4 5h2o

Posted by India K 7 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Naveen Sharma 7 years, 2 months ago

Ans. \(Na_2 S_2O_3\)

Atomic mass of Na = 23u
Atomic mass of S = 32u
Atomic mass of O = 16u

\(Formula \space Unit \space Mass\space of \space Na_2S_2O_3 = 2 \times 23 + 2\times 32 + 3\times 16 \)

=> 46+64+48 = 158 u

\(CuSO_4.5(H_2O) \)

Atomic mass of Cu = 63 u
Atomic mass of S = 32u
Atomic mass of O =16 u
Atomic mass of H =8 u

\(Formula \space Unit \space Mass\space of \space CuSO_4.5(H_2O) =63.5 + 32 + 4\times 16 + 5[(2\times 1) +16]\)

=> 63.5+32+64 + 90 = 249.5 u

3Thank You

ANSWER

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