Alright, I guess it's going in here, even though it's kinda necro-ing.....
I have a question about the hybridization patterns of carbon in an ethene molecule. Why is it that, when carbon is going to make three bonds (one double bond to another carbon and two single bonds to hydrogen atoms), it hybridizes an s orbital and two p orbitals, leaving the third p orbital empty? If it only needs three orbitals for bonding, why no promote an electron to the third p orbital and not hybridize at all?
Ok, I need some help with my Japanese hw here (hopefully someone is good with sentence structure.) I am trying to translate this:
It is now 12:00 PM in Ottawa.
Would this be correct?
Otawa wa gogo jyuu ni ji de su.
If I make a 0.10 M sodium fluoride solution, what is the pH, [H+], and [OH-]?
I know that the NaF dissociates completely because it is a sodium salt, which leaves us with Na+, F-, H2O, and a negligible amount of H+ and OH- ions. The equation that I got from that was the following:
F- + H2O <=> HF + OH-
Is this accurate so far, or does the above reaction go to completion?
Hey, I was wondering if anyone could help me understand this question for Chemistry:
There is a trend that shows that certain hydroxides (magnesium, calcium, and strontium hydroxide), while all being in the same group, have very different solubility product constants (the higher on the table, the lower the product constant is). Why does this trend exist?
I was trying to come up with a reason but I honestly don't know why. Does it have to do with the number of full electron shells? That's all I can come up with.
ln(7^(5n-8)) = ln(1/2401) : take the natural log of both sides
(5n-8)*ln(7) = ln(1/2401) : ln properties say that ln(x^y) =yln(x)
5n-8 = ln(1/2401)/ln(7)
5n = ln(1/2401)/ln(7) + 8
n = (ln(1/2401)/ln(7) + 8)/5 : you can polish this up a bit if you want, but it's a messy problem to begin with, so unless your teacher specifies, you might as well make him/her read a bit more into your answer as punishment for such a needlessly messy problem =P 1/2401? Really?
Fixed.
Also, isn't the ln(1/2401)/ln(7) = -ln(2401/7) = -ln(343)?
(Note:I realize there's a homework help thread, but it seems like no one reall goes there, and i'm looking for speed. :P)
I have a math final tomorrow and i'm freaking out a little at the moment. My math book isn't helping so i was wondering if there was any way someone could find a way to explain it to me in a way i could understand.(i'm absolutely horrendous at math)
Example problems
Write using rational exponents: 2(square root) 10a^7b^9
and solve: 7^5n-8 = 1/2401
i'd be so greatly appreciative if anyone could help
Now is that 10a^(7b^9), or (10a)^((7b)^9), or something else like that?
Now it sounds like I did but I didn’t say “**** Mrs. Matsunaga.” I said “****, Mrs. Matsunaga” which was actually my method of expressing displeasure. Inappropriate and disrespectful? Yes. Swearing at her? No. To this day I do not understand why she will not believe me. Not only do I have no incentives to lie to her about it (I’ve already been suspended), I don’t have a past history of lying.
This is way too whiney. Stop complaining about how unfair it is; they don't care. You're suppose to show how you've "seen the error of your ways" and changed for the better, unless it was really unjust, which this wasn't. You swore in a classroom, which in and of itself is grounds for a suspension at many schools.
Overall, stop trying to make it out like it wasn't your fault. It would be much better if you rewrote it to say "Yeah, I swore, and I got a suspension, and now I realize the error of my ways, and now I've changed". They don't want to hear your excuses.
Okay, now I understand. But here's my issue: I have no idea how to integrate calculus into that. All I know is that the shortest distance between two points is a straight line, and that since the bug is walking along the walls, you can consider the two sides it walks along to be similar to one rectangle (4x8). That would mean that the bug walks from (0,0,0) to (4,2,0) to (4,4,4). But that's all geometry. Where's the Calculus?
This is a little difficult without a picture, so let me try to create one. Imagine that the 8 corners of the cube are divided into two squares oriented as follows...
23 67
14 58
with the 1,2,3,4 square representing the "floor" of the cube and the 5,6,7,8 square the "ceiling." (such that 5678 is "stacked on top" of 1234).
Thus P is corner 1 and Q is corner 7.
Given this, the fastest way for the bug to get from P to Q is to walk in a straight line from P to a point on the line 23 and then from that point to Q. But to which point on 23 should the bug walk?
Hopefully the application of calculus is a little clearer now.
Well, here's the thing, the bug has to walk along the walls (the original 6). Sorry I forgot to mention that...
I have a question about the hybridization patterns of carbon in an ethene molecule. Why is it that, when carbon is going to make three bonds (one double bond to another carbon and two single bonds to hydrogen atoms), it hybridizes an s orbital and two p orbitals, leaving the third p orbital empty? If it only needs three orbitals for bonding, why no promote an electron to the third p orbital and not hybridize at all?
Thanks to the [Æther] shop for the sig!
I would translate it as follows:
Ima, Otawa wa gogo jyuu ni ji desu.
In kana it would be:
いま、オタワは ごご じゅうにじ です。
and with Kanji it would look like this:
今、オタワは午後十二時です。
Thanks to the [Æther] shop for the sig!
If I make a 0.10 M sodium fluoride solution, what is the pH, [H+], and [OH-]?
I know that the NaF dissociates completely because it is a sodium salt, which leaves us with Na+, F-, H2O, and a negligible amount of H+ and OH- ions. The equation that I got from that was the following:
F- + H2O <=> HF + OH-
Is this accurate so far, or does the above reaction go to completion?
Thanks to the [Æther] shop for the sig!
Huh.
Thanks to the [Æther] shop for the sig!
There is a trend that shows that certain hydroxides (magnesium, calcium, and strontium hydroxide), while all being in the same group, have very different solubility product constants (the higher on the table, the lower the product constant is). Why does this trend exist?
I was trying to come up with a reason but I honestly don't know why. Does it have to do with the number of full electron shells? That's all I can come up with.
Thanks to the [Æther] shop for the sig!
Nope, you're right. The division thing doesn't work, but the negative thing does. So I'd go with -ln(2401)/ln(4). (I know that one works)
Thanks to the [Æther] shop for the sig!
Fixed.
Also, isn't the ln(1/2401)/ln(7) = -ln(2401/7) = -ln(343)?
Thanks to the [Æther] shop for the sig!
Now is that 10a^(7b^9), or (10a)^((7b)^9), or something else like that?
Same with the next one, is it 7^(5n-8), or what?
Parentheses, man, parentheses.
Thanks to the [Æther] shop for the sig!
Find the velocity of the object as a function of time if the initial velocity is V sub 0, where dt/dv = 1/(kv - 9.8) and k is a constant.
Thanks to the [Æther] shop for the sig!
"Find the velocity of the object as a function of time if the initial velocity is V sub 0."
Thanks to the [Æther] shop for the sig!
Does anyone know the solution to this equation...
dt/dv = 1/(kv - 9.8) ... where k is a constant.
Thanks to the [Æther] shop for the sig!
This is way too whiney. Stop complaining about how unfair it is; they don't care. You're suppose to show how you've "seen the error of your ways" and changed for the better, unless it was really unjust, which this wasn't. You swore in a classroom, which in and of itself is grounds for a suspension at many schools.
Overall, stop trying to make it out like it wasn't your fault. It would be much better if you rewrote it to say "Yeah, I swore, and I got a suspension, and now I realize the error of my ways, and now I've changed". They don't want to hear your excuses.
Thanks to the [Æther] shop for the sig!
Thanks to the [Æther] shop for the sig!
Thanks to the [Æther] shop for the sig!
EDIT:
Wait, do you mean that the 1234 is
1 2
3 4
or
1 2
4 3
or something else?
Thanks to the [Æther] shop for the sig!