physixs ideal gas question

[hassam]

wat anser u get for ii....i m getting 746 bt markschemes says 741

 

[hassam]

the approach i used was that 1st u get 415 moles of gas in cylinder in part i ans......then using info in sceond line u cn figure out no . of mol in one baloon....theyturned out to be .55 mol.....
so 1 baloon has .55 mol ....how many baloons will have 415 moles....so by this way u get 746 .....is there anything rong i did

 

[abcde]

I get 746 for part (ii) as well.
P1V1 = P2V2
=> V2 = (2.50 x 10^7 x 4 x 10^4)/ (1.85 x 10^5)
=> V2 = 5.405 x 10^6
No. of balloons that can be filled = Total volume of hydrogen gas/ Volume in each balloon
= (5.405 x 10^6)/ (7.24 x 10^3)
= 746.603
So 746 balloons can be filled. Same answer this way, too.

 

[destined007]

It's 414.95, not 415
It's 0.56, not 0.55.

 

[hassam]

buddy still u get 746.....

 

[hassam]

buddy still u get 746.....

 

[hassam]

buddy still u get 746.....

 

[destined007]

414.95/0.56=741