The Homework Help Thread

[Why-Gnome-Ear-Fifty 400]

OK, so this time I believe I've used the search bar thoroughly and made sure that there isn't a thread like this already. If there is, shame on me.

 

Seeing as most of the people on this thread seem to be high school students (according to poll, amirite?) I thought it would be useful for people to ask homework questions on here. Especially because I often times find myself doing homework and searching for answers....while also with the MLPforums tab open.

 

Hopefully enough people participate such that questions can be answered quickly!

[TomokoKuroki 1,707]

Depending if I know the subject, and the current lesson at hand, I'll offer any help I can.

[Ra1nbowCrasH 272]

This seems like a good idea; but how would you show math problems with fractions?

[HomuraBL 851]

This seems like a good idea; but how would you show math problems with fractions?

 

1/2?

[Why-Gnome-Ear-Fifty 400]

What I've typically done in other places is to type it out as I would into WolframAlpha: Ex. 1/4+1/2, (x+16)/43, (sin(2x))/(sqrt(x^2))

[Ra1nbowCrasH 272]

1/2?

 

wouldn't people see that as division though?

[Aureity 3,055]

What I've typically done in other places is to type it out as I would into WolframAlpha: Ex. 1/4+1/2, (x+16)/43, (sin(2x))/(sqrt(x^2))

 

God, that's painful to read XD

Unfortunately, it's probably what we'll have to resort to, since there isn't a MathType equivelent on the forums...

[HomuraBL 851]

wouldn't people see that as division though?

 

Depends on the problem. If the solution is this: 1 1/2 then you know its a fraction.

 

Plus, that what fractions are, division.

Edited April 8, 2012 by RaccoonBL

[Randomiser 115]

wouldn't people see that as division though?

 

Aren't fractions division? Or am I missing something?

Edit: and Raccoon just edited to say the same thing.

Edited April 8, 2012 by Randomiser

[Endpol 27]

For the most part, fractions are division, aren't they?

[Ra1nbowCrasH 272]

Depends on the problem. If the solution is this: 1 1/2 then you know its a fraction.

 

Plus, that what fractions are, division.

 

Yeah, but what I mean is that if a problem is supposed to have a fraction solution, you can't use a decimal in its place.

[Endpol 27]

Yeah, but what I mean is that if a problem is supposed to have a fraction solution, you can't use a decimal in its place.

 

You could always just do improper fractions, and have them simplify it?

[HomuraBL 851]

Yeah, but what I mean is that if a problem is supposed to have a fraction solution, you can't use a decimal in its place.

 

I'm pretty sure if someone explains it, they will understand.

[Ra1nbowCrasH 272]

Never mind.

[Aureity 3,055]

We can worry about that once we get there, but for now, why are we getting so fussed up over this? We'll wing it when somepony needs math help XD

Edited April 8, 2012 by Aureity

[Pinkazoid 3,493]

I'm good with math, but I'm probably in a lower grade than you =

[Aureity 3,055]

So, does anyone actually HAVE a homework question? I've got a bit of free time right now, and I'm bored...

[Why-Gnome-Ear-Fifty 400]

Oh, and I also want to request that if someone answers a question (which we have yet to see any of....sigh ) that he/she quotes the question within the answer. Cause that would make it a little easier for askers.

[letterone 1,204]

wouldn't people see that as division though?

 

Technically fractions and division are the same thing.

EDIT: Never mind, that was already dealt with.

Edited April 8, 2012 by letterONE

[Aureity 3,055]

Meh, I'll get us started. This one is a chemistry problem. (regular level, not AP, I'm not good enough for AP yet >.<)

 

An excess of zinc added to 800mL of a hydrochloric acid solution evolves 1.21 Liters of hydrogen gas measured over water at 21 degrees Celcius and 747.5 mmHg. What is the molarity of the acid?

 

This chemistry problem should be easy for me, but my brain isn't working today...>.<

[Why-Gnome-Ear-Fifty 400]

Meh, I'll get us started. This one is a chemistry problem. (regular level, not AP, I'm not good enough for AP yet >.<)

 

An excess of zinc added to 800mL of a hydrochloric acid solution evolves 1.21 Liters of hydrogen gas measured over water at 21 degrees Celcius and 747.5 mmHg. What is the molarity of the acid?

 

This chemistry problem should be easy for me, but my brain isn't working today...>.<

 

I know absolutely nothing about chem, but googling questions tends to yield results.

 

http://answers.yahoo.com/question/index?qid=20100201202542AAfbIkv

 

I don't know what in the world they're even saying (in biology, lol XD) but I hope that second answer makes sense!

[Mr. Wobbels 664]

Meh, I'll get us started. This one is a chemistry problem. (regular level, not AP, I'm not good enough for AP yet >.<)

 

An excess of zinc added to 800mL of a hydrochloric acid solution evolves 1.21 Liters of hydrogen gas measured over water at 21 degrees Celcius and 747.5 mmHg. What is the molarity of the acid?

 

This chemistry problem should be easy for me, but my brain isn't working today...>.<

 

50.68 M

 

((.984 atm)(1.21 L))/(294.15 K)n = .082057 atm*L/mol*K

n = 20.271 mol H₂

The conversion is 2:1, so I won't do that out.

40.542 mol HCl / .8 L = 50.68 M

 

Disregard this

Edited April 8, 2012 by Mr. Wobbels

[Aureity 3,055]

50.68 M

 

((.984 atm)(1.21 L))/(294.15 K)n = .082057 atm*L/mol*K

n = 20.271 mol H₂

The conversion is 2:1, so I won't do that out.

40.542 mol HCl / .8 L = 50.68 M

 

50 Molarity? Dear god, that's concentrated...

Thank you for the help

 

Edit: It seems I need to refresh on stoichiometry...>___> Back to review, then >.<

Edited April 8, 2012 by Aureity

[Mr. Wobbels 664]

50 Molarity? Dear god, that's concentrated...

Thank you for the help

 

Edit: It seems I need to refresh on stoichiometry...>___> Back to review, then >.<

 

That's what I was thinking.

[Aureity 3,055]

That's what I was thinking.

 

My failing at stoichiometry or the high concentration?