Recent content by dramadeur

I don't quite get, where does the V0x=v * d/(sqrt(d^2+(h-y0)^2) come from? also, what does (h-y0) equal to? t/v0y?

If the ball was going upwards for 6 seconds (at 6th second it reaches the top) Does it mean that the change in velocity between 4-5 seconds would be the same as the change in velocity between 6-7 seconds?

f(x) = x^3 - 12x^2 + 44x - 46 x from 1 to 7 The attempt at a solution: f(1) = -13 f(2) = 2 f(4) = 2 f(5) = -1 f(6) = 2 So naturally, the answer should be: (1,2) U (4,5) U (5,6) right? Well, it didn't accept this answer. I think there is something wrong with whatever that is accepting the...

I don't get it, why is the graph always linear? Shouldn't its slope be zero when the ball is at the top and stops there for a moment? The way it is "explained" is that it's at the top for instantaneous moment. Okay, but, if let's say, ball was going upward for a 5 sec, then stopped for 1 second...

2NO + O2 -> 2NO2 "Oxidation of NO" So a reactant - 2NO doesn't seem to lose an electron, it only gains an additional oxygen atom. So, I guess, oxidation is also gain of an oxygen? ...

But what would happen to a single left out electron in any atom where it's possible? Would it be placed on the central atom... or? Where would it go?

Uhm... I said NH4 not NH4+ What will the lewis structure be? Will it have 1 electron on the central atom?

How do I know? That's why I'm asking!

Yeah I dun goofed, sorry. Anyway, if this molecule was just NH4, and it had 9 molecules, would it be capable of hydrogen bonding? Since it would have a electron on its central atom...

I've just updated my post. How can't there be? Nitrogen has 5 valence e + 4 Hydrogen valence e -1 from the charge sign = 9 electrons to go around. So... there's only 1 electron on the central atom?

If you draw lewis structure, central atom (N) will have 1 lone pair and 4 single bonds with Hydrogen. Why can't hydrogen in this ion molecule be able to form hydrogen bonding with other molecules alike? Is it because there's only 1 electron on the central atom?See for yourself: 5N + 4H -1 = 9...

No it's not HW. I'm asking to explain the answer. Not to solve it. If I say "hexane" I clearly mean the whole molecule. So, why does hexane have higher intermolecular force than propylamine, if the latter has the hydrogen bonding capability (since its Hydrogen is bonded to Nitrogen).

< Moderator Note -- thread moved to Homework Help forums >[/color] Shouldn't Propylamine (C3H7NH2) be able to form hydrogen bonds with alike molecules? Hexane (c6h14) doesn't seem to have hydrogen bonding capability.

a 9 L vessel contains 3 moles of helium and 3 moles of nitrogen at a pressure of 10 atm. Maintaining constant temperature, an additional 2 moles of helium are added. Assuming gases behave ideally, what are the partial pressures of nitrogen and helium at the end? Initially there's: 3mol He/(3mol...

As you can see, octet rule isn't satisfied for the central atom Xe, it has 2 more electrons attached to it. So does it mean, that you should first try to make sure octet rule works for any "side" atoms, and then you just put any remaining electrons to a central atom? (or central atoms?) And if...