Recent content by brbrett

Thanks!

Ah, so then because I calculated the nucleus' charge to be +3, with a single electron there would be a charge of +2? That would make a lot of sense. Then I assume I didn't make any mistakes in solving for charge of the nucleus to figure out the ion's charge? Thanks!

Due to shielding, the effective charge would be about +2? I think I kinda see that maybe my calculations weren't wrong, but that I didn't understand the question right, but I still don't really get it.

Homework Statement An atom or ion with only one electron is excited from the ground state to the first excited state (n = 2) with a photon of 1.47E-17 J of energy. What is the charge on the one-electron species? A. 0 B. +1 C. +2 D. +3 E. +4 Homework Equations E=-(2.18E-18)(Z2)/(N2) The...

Thanks! I'm starting to get it now. One question I have is why would 32/1 be negative? I know it must be, considering how the answers in the MC are all positive, and there is a negative sign in front of the constant. Also all the talk about effective charge was good review for me, so it helps...

Ok, so now I vaguely recall the concept of Effective charge. If I were to plug this into my formula, would I want to replace (Z2/N2) with Δ(Z2/N2)? To clarify as to what I would plug in: E=-(2.18E-18)((0/1)-(3/1))=6.54E-18 This is one of the given answers, which is good, however, the answer is...

Lithium should have 1 electron remaining if two were removed. Also, we weren't told in the textbook I'm using what Z is. We were told about every other value though, which I find is funny. Back on topic though, I did think of this, but I'm not sure how I can get a number out of this. Wouldn't...

Homework Statement What is the third ionization energy of Li in its ground state? A. 4.91 E-18 J B. 6.54 E-18 J C. 7.79 E-18 J D. 9.20 E-18 J E. 1.96 E-17 J Homework Equations Maybe: EN=-(2.18E-18)(Z2/N2) The Attempt at a Solution Plugging in values doesn't give me any of the answers. At...

Homework Statement What is the maximum [CO32-] that can exist in a saturated solution of AgBr? Homework Equations Equilibrium Constants, ICE tables sqrt = square root The Attempt at a Solution Ksp = [Ag+][Br-] sqrt(5.4E-13) = x (Ag and Br are in equal proportion to one another) where x...

Homework Statement N2O4(g) + energy <---> 2NO2(g) How are Keq and [N2O4] affected by the addition of Ne, an inert gas, in a container at constant volume and temperature. Keq [N2O4] a) no change/no change b) no change/ increases c) increases/decreases d) decreases/increases Homework...

The reaction was specified in this case, and it is the one I posted above. This text has a lot of errors, so I'm not too surprised it's wrong this time. Good to double check though.

Homework Statement Equal Volumes of 3.60 M A2+ and 6.80 M B- are mixed. After the reaction, equilibrium is established with [B-] = 0.40 M. What is the [A2+] at equilibrium? Homework Equations Ice table, algebra The Attempt at a Solution This is probably a really easy problem, but I seem to be...

I did think I was right. Just looked, and it seems there is a typo in the book. It says 5.1 x 1025, but if you change it to 5.1 x 10^25, it matches my answer (or close enough anyways). Gotta love it when textbook answers aren't proofread... >.>

Homework Statement Certain pollutants encourage the following decomposition of ozone: 2O 3(g) -> 3O 2(g), at a rate of 6.5 x 10-4 M O 3/s. How many molecules of O2 gas are formed in each litre of atmosphere every day by this process? (As this problem provides a rate in units of mol/L/s and...

Thanks! I'll definitely take a look at it.