Question

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

Answer 1

@waterineyes

Answer 2

Can you try it once??

Answer 3

let me c

Answer 4

Find molecular mass of H2SO4

then use molar mass concept..

Answer 5

no of moles in 392 g of H2SO4 = x

Answer 6

am not getting !

Answer 7

you better teach !

Answer 8

See:

Find molecular mass of H2SO4..

Answer 9

98

Answer 10

we got that in the first problem :)

Answer 11

1 mole = 98 g

Right using molar mass..

Answer 12

okay

Answer 13

then ?

Answer 14

98 g = 1 mole


Find it for 392 g..

Answer 15

392 * 1 / 98 = 4 moles
correct ?

Answer 16

98*4 = 392 I think..

Answer 17

Yep you are right..

Answer 18

:)

Answer 19

c and d are same so lets leave it

Answer 20

i'll do it on my own :)

Answer 21

For b:

22.4 L = 1 mole

Find it for 44.8 L.

Answer 22

how to do b ?

Answer 23

1 * 44.8 /22.4 = 2 moles

Answer 24

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..

Answer 25

okay teacher :P

Answer 26

I am here only..

So I will check them when I will come..

So don't worry...

Answer 27

thank you teacher :)