Knowledge Test lets go bitchz

[Sub Bass Woofrz 10+ year member]

One ***** of a problem. I got the right answer can anyone else haha.

Hydrogen gas is produced when zinc reacts with sulfuric acid.

Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g)

If 138 mL of wet H2 is collected over water at 24°C and a barometric pressure of 730. torr, how many grams of Zn have been consumed? (The vapor pressure of water is 22.38 torr at 24°C.)

Click to read more...

 

[Imtjnotu 5,000+ posts]

Potato

 

[UnderFire 10+ year member]

This shit =/= knowledge

 

[Sub Bass Woofrz 10+ year member]

AP chemistry knowledge i guess... ok want another 1 then how about AP calc

 

[av83 10+ year member]

[quote name='Sub Bass Woofrz']One ***** of a problem. I got the right answer can anyone else haha.

Hydrogen gas is produced when zinc reacts with sulfuric acid.
Zn(s) + H2SO4(aq) → ZnSO4(aq) + H2(g)

If 138 mL of wet H2 is collected over water at 24°C and a barometric pressure of 730. torr, how many grams of Zn have been consumed? (The vapor pressure of water is 22.38 torr at 24°C.)[/QUOTE]
@West ; likely haz this

 

[Sub Bass Woofrz 10+ year member]

we can compare answers //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif i submitted my answer thru webassign so i know its right

 

[Sub Bass Woofrz 10+ year member]

ok heres ap calc question b4 i go to bed off my last test....

integral of (sin^3(3x)cos(3x)dx)

 

[West]

@West ; likely haz this

I dont do chem problems for fun lol

 

[Sub Bass Woofrz 10+ year member]

I dont do chem problems for fun lol

well the answer is .345 grams if you were wondering. Hope you sleep better //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[West]

well the answer is .345 grams if you were wondering. Hope you sleep better //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

I think you use pv=nrt to get the # of moles of H2

(you dont need to know the vapor pressure at all I believe)

Then you use know the number of moles of zinc (1:1)

then convert the moles of zinc to grams of zinc

 

[Sub Bass Woofrz 10+ year member]

I think you use pv=nrt to get the # of moles of H2(you dont need to know the vapor pressure at all I believe)

Then you use know the number of moles of zinc (1:1)

then convert the moles of zinc to grams of zinc

yea pretty much, also have to subtract the pressure from the water from barometric pressure though, then just PV nRT

 

[jungstah 10+ year member]

ok heres ap calc question b4 i go to bed off my last test....
integral of (sin^3(3x)cos(3x)dx)

= 1/12 sin^4(3x) + C

 

[Sub Bass Woofrz 10+ year member]

I think you use pv=nrt to get the # of moles of H2(you dont need to know the vapor pressure at all I believe)

Then you use know the number of moles of zinc (1:1)

then convert the moles of zinc to grams of zinc

oh and its also a 1:2 mole ratio because H_2.

 

---------- Post added at 11:12 PM ---------- Previous post was at 11:11 PM ----------

 

= 1/12 sin^4(3x) + C

nicee... on that bish i forgot to chain rule the sin^3(3x) so i got 1/4sin^4(3x) ... better than me

 

[kowboy 10+ year member]

I hope you guys get rich one day - you deserve it, lol!

 

[Sub Bass Woofrz 10+ year member]

knowledge doesn't really determine success... determination and personality more so in my opinion... knowledge doesn't hurt tho haha