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.

1. ashna

@waterineyes

2. waterineyes

Can you try it once??

3. ashna

let me c

4. waterineyes

Find molecular mass of H2SO4 then use molar mass concept..

5. ashna

no of moles in 392 g of H2SO4 = x

6. ashna

am not getting !

7. ashna

you better teach !

8. waterineyes

See: Find molecular mass of H2SO4..

9. ashna

98

10. ashna

we got that in the first problem :)

11. waterineyes

1 mole = 98 g Right using molar mass..

12. ashna

okay

13. ashna

then ?

14. waterineyes

98 g = 1 mole Find it for 392 g..

15. ashna

392 * 1 / 98 = 4 moles correct ?

16. waterineyes

98*4 = 392 I think..

17. waterineyes

Yep you are right..

18. ashna

:)

19. ashna

c and d are same so lets leave it

20. ashna

i'll do it on my own :)

21. waterineyes

For b: 22.4 L = 1 mole Find it for 44.8 L.

22. ashna

how to do b ?

23. ashna

1 * 44.8 /22.4 = 2 moles

24. waterineyes

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

okay teacher :P

26. waterineyes

I am here only.. So I will check them when I will come.. So don't worry...

27. ashna

thank you teacher :)

28. ashna

|dw:1345185497775:dw|

29. ashna

am done :D

30. ashna

ll cum in the evening .. thanks for the help :)

31. ashna

or in the afternoon :D

32. waterineyes

Medal for c and d part.. You have calculated them very correctly..

33. ashna

thank yu :)