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Urgent Pls!!! Chemistry Assignment To Be Submited Tomorow. by Simonwal: 9:38pm On Mar 16, 2012
Calculate the volume of hydrogen at stp when 25g of Zinc are added to excess dilute hydrochloric acid at 35degre centgrad and 778mmHg. According to the equation below. Zn(g) +2HCL---; ZnCL2 +H2(g).
Molar volume at S.T.P =22.4dm^2, Zn=65, H=1
Re: Urgent Pls!!! Chemistry Assignment To Be Submited Tomorow. by Acidosis(m): 10:35pm On Mar 16, 2012
Simonwal: Calculate the volume of hydrogen at stp when 25g of Zinc are added to excess dilute hydrochloric acid at 35degre centgrad and 778mmHg. According to the equation below. Zn(g) +2HCL---; ZnCL2 +H2(g).
Molar volume at S.T.P =22.4dm^2, Zn=65, H=1
What were you doing when your teacher was busy solving a similar calculation?
Re: Urgent Pls!!! Chemistry Assignment To Be Submited Tomorow. by Xtfield(m): 11:34pm On Mar 16, 2012
He was on facebook so much he did not have time to face his books
Re: Urgent Pls!!! Chemistry Assignment To Be Submited Tomorow. by Simonwal: 5:06am On Mar 17, 2012
Pls i need positive response. Plsss
Re: Urgent Pls!!! Chemistry Assignment To Be Submited Tomorow. by owo2390(m): 5:15am On Mar 17, 2012
use pv=nrt

v= nrt/p

n = number of moles of hydrogen
r= 0.08321
t = 35+273

p = 778mmHg. remember to convert to atmosphere

use the mass of zinc and stoichiometric relationship of zinc and hydrogen to ascertain the number of moles of hydrogen.

you have all the info you need to figure the correct answer. good luck

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Re: Urgent Pls!!! Chemistry Assignment To Be Submited Tomorow. by Simonwal: 6:11pm On Mar 17, 2012
@ Owo2390, i couldnt get the value for number of moles of hydrogen. Pls can u help me out
Re: Urgent Pls!!! Chemistry Assignment To Be Submited Tomorow. by owo2390(m): 6:34pm On Mar 17, 2012
Divide the Mass of Zinc by its molar mass. Since Zn and H2 have a 1:1 stoichiometric relationship, the moles of Zn are also the moles of H2. Once you do that you should be able to figure out the rest.
Re: Urgent Pls!!! Chemistry Assignment To Be Submited Tomorow. by Simonwal: 8:01pm On Mar 17, 2012
@OWO23W,Thanks very much

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