Can you please help me with this?

[Lacrosse Boy]

Can someone please balance the following chemical equation for me? I always have trouble with this stuff, and I'd appreciate it greatly if you could do it and tell me exactly what you did. I keep screwing it up somehow.

Al + H[2]SO[4] --> Al[2](SO[4])[3] + H[2]

[#] means that number is a subscript. Please help! Thanks!!!!

[DirectPixel]

[2]Al + [3](H[2]SO[4]) --> Al[2](SO[4])[3] + [3](H[2])

[Jake Bunce]

directpixel's balanced equation looks good to me.

[Lacrosse Boy]

Thanks so much!

I am horrible with balancing them. I try and try, but they never end out correct. Luckily next year I am in Physics. It looks much better then Chemistry. My favorite high school science course has been Physical Science.

[Joe Gronlund]

answer is always "C"

[Lacrosse Boy]

I have one more question -- in there, what would be the aqeous, etc things in the equation. So the (s), (l), (g), and (aq). I never understand that stuff either.

[Jake Bunce]

I have one more question -- in there, what would be the aqeous, etc things in the equation. So the (s), (l), (g), and (aq). I never understand that stuff either.

Aluminum is a solid. I think the sulfuric acid is going to be aqueous because it's a strong acid. I think Aluminum sulfate is a solid. H2 is a gas. That would mean the spectator is H2.

I'm not positive though.

[ManagerJosh]

S = Solid
L = Liquid
G = Gas
Aq = Aqueous

[Jake Bunce]

wait wait wait. Sulfuric acid doesn't break apart into H2 gas and sulfate ion, it has two ionizations.

H2(SO4) -> H+ + H(SO4)-
H(SO4)- -> H+ + SO4^2-

I'm still not positive though. Last semester is too far back to remember.

[Chen]

Sure, you can balance these little equations, but can you tell me what the potential energy of an object 10,500km high is? Or how long it will take him to fall? Chemistry is for n00bs.

[Kings]

Sure, you can balance these little equations, but can you tell me what the potential energy of an object 10,500km high is?

Need a mass (or a force) to calculate that....

[Jake Bunce]

chemistry sucks. I hate it!

...and I have to take one more chemistry class for my major

[Scott MacVicar]

potential enery = mass x gravity x height

gravity is 9.8ms^-2 and you stated the height as 10,500km = 1,050,000m though thats in space.... or is that 10,500m?

[Chen]

potential enery = mass x gravity x height

gravity is 9.8ms^-2 and you stated the height as 10,500km = 1,050,000m though thats in space.... or is that 10,500m?

That's true when the height =~ Earth's radius. But when you're in outer space it's not like that, and the gravity isn't constant so everything changes.

[DirectPixel]

Gravity is never constant.

9.8 m/s^2 is an estimate at the surface of the earth. It changes (very minutely) if something is not on the surface (eg. 10ft in the air).