ashna
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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ashna
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@waterineyes
waterineyes
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Can you try it once??
ashna
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let me c
waterineyes
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Find molecular mass of H2SO4
then use molar mass concept..
ashna
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no of moles in 392 g of H2SO4 = x
ashna
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am not getting !
ashna
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you better teach !
waterineyes
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See:
Find molecular mass of H2SO4..
ashna
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98
ashna
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we got that in the first problem :)
waterineyes
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1 mole = 98 g
Right using molar mass..
ashna
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okay
ashna
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then ?
waterineyes
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98 g = 1 mole
Find it for 392 g..
ashna
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392 * 1 / 98 = 4 moles
correct ?
waterineyes
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98*4 = 392 I think..
waterineyes
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Yep you are right..
ashna
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:)
ashna
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c and d are same so lets leave it
ashna
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i'll do it on my own :)
waterineyes
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For b:
22.4 L = 1 mole
Find it for 44.8 L.
ashna
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how to do b ?
ashna
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1 * 44.8 /22.4 = 2 moles
waterineyes
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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..
ashna
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okay teacher :P
waterineyes
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I am here only..
So I will check them when I will come..
So don't worry...
ashna
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thank you teacher :)
ashna
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|dw:1345185497775:dw|
ashna
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am done :D
ashna
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ll cum in the evening .. thanks for the help :)
ashna
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or in the afternoon :D
waterineyes
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Medal for c and d part..
You have calculated them very correctly..
ashna
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thank yu :)