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ashna

  • 3 years ago

calculate the no. of moles : (a) 392 g of H2SO4. (b) 44.8 L of CO2. (c) 9 g Al. (d) 25 g CaCo3.

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  1. ashna
    • 3 years ago
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    @waterineyes

  2. waterineyes
    • 3 years ago
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    Can you try it once??

  3. ashna
    • 3 years ago
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    let me c

  4. waterineyes
    • 3 years ago
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    Find molecular mass of H2SO4 then use molar mass concept..

  5. ashna
    • 3 years ago
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    no of moles in 392 g of H2SO4 = x

  6. ashna
    • 3 years ago
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    am not getting !

  7. ashna
    • 3 years ago
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    you better teach !

  8. waterineyes
    • 3 years ago
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    See: Find molecular mass of H2SO4..

  9. ashna
    • 3 years ago
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    98

  10. ashna
    • 3 years ago
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    we got that in the first problem :)

  11. waterineyes
    • 3 years ago
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    1 mole = 98 g Right using molar mass..

  12. ashna
    • 3 years ago
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    okay

  13. ashna
    • 3 years ago
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    then ?

  14. waterineyes
    • 3 years ago
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    98 g = 1 mole Find it for 392 g..

  15. ashna
    • 3 years ago
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    392 * 1 / 98 = 4 moles correct ?

  16. waterineyes
    • 3 years ago
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    98*4 = 392 I think..

  17. waterineyes
    • 3 years ago
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    Yep you are right..

  18. ashna
    • 3 years ago
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    :)

  19. ashna
    • 3 years ago
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    c and d are same so lets leave it

  20. ashna
    • 3 years ago
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    i'll do it on my own :)

  21. waterineyes
    • 3 years ago
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    For b: 22.4 L = 1 mole Find it for 44.8 L.

  22. ashna
    • 3 years ago
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    how to do b ?

  23. ashna
    • 3 years ago
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    1 * 44.8 /22.4 = 2 moles

  24. waterineyes
    • 3 years ago
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    Now do here all the three left and I am going to have bath.. While teaching you I forgot to take bath today.. Yes 2 moles is right @ashna Now try other two till then I am having bath..

  25. ashna
    • 3 years ago
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    okay teacher :P

  26. waterineyes
    • 3 years ago
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    I am here only.. So I will check them when I will come.. So don't worry...

  27. ashna
    • 3 years ago
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    thank you teacher :)

  28. ashna
    • 3 years ago
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    |dw:1345185497775:dw|

  29. ashna
    • 3 years ago
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    am done :D

  30. ashna
    • 3 years ago
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    ll cum in the evening .. thanks for the help :)

  31. ashna
    • 3 years ago
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    or in the afternoon :D

  32. waterineyes
    • 3 years ago
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    Medal for c and d part.. You have calculated them very correctly..

  33. ashna
    • 3 years ago
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    thank yu :)

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