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CBSE Class 11-science Answered

how many gram in 99% pure 4.94 mole calcium nitrate tetrahydrate Ca(NO3)2.4H2O
Asked by theraianurag1 | 04 Jun, 2019, 01:00: PM
Expert Answer
Molecular weight of Ca(NO3)2.4H2O  = 40+(14+48)2+72=236 u
 
Number space of space moles equals fraction numerator weight space in space gram over denominator molecular space weight end fraction
weight space in space gram equals 4.94 cross times 236
space space space space space space space space space space space space space space space space space space space space space space equals 1165.84 space straight g
But space it space is space not space 99 percent sign space pure
So space 1165.84 cross times 99 over 100
space space space space equals space 1154.18 space straight g
Answered by Ravi | 04 Jun, 2019, 04:49: PM
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