anonymous
  • anonymous
calculate the no. of moles : (a) 392 g of H2SO4. (b) 44.8 L of CO2. (c) 9 g Al. (d) 25 g CaCo3.
Chemistry
katieb
  • katieb
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anonymous
  • anonymous
anonymous
  • anonymous
Can you try it once??
anonymous
  • anonymous
let me c

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

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