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Siddharth Srivastava posted an Question
July 09, 2021 • 20:39 pm
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30 points
30 points
- IIT JAM
- Chemistry (CY)
Calculate the mass of h3po4 which contain 100 molecules of h3po4 ?
calculate the mass of H3PO4 which contain 100 molecules of H3PO4 ?
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Dinesh khalmaniya 1![best-answer]()
A molecule of the compound H3PO4 contains three hydrogen atoms, one phosphorus atom, and four oxygen atoms. The molar mass is obtained by adding up the average atomic masses of these atoms: Molar mass H3PO4 = 3(1.008 g) + 1(30.97 g) + 4(16.00 g) = 97.99 g. you can simply get mass of 100 molecules by multiplying this value with 100
but , sir can we divide 100 by Avogadro number = 6.022 × 10²³ to get no.of moles, after that we can multiply it by molecular mass of H3PO4.
yha pr only molecular mass pucha he to 1 molecule ka molecular mass nikal lo or ise 100 se multipy krne pr 100 molecules ka aa jayega