Rucha

Find the volume of the solid obtained by rotating the region under the graph of f(x)= 9-x^2 for 0<= x<=3 about the vertical axis x= -2. My answer: 81 pi/2

How do you integrate 2x^5 • e^x^2 ? I would say that this cannot be evaluated because the answer is more complicated than the original problem. Am I correct? Or is it doable?

What is the effective nuclear charge of the following? F- Na+ I know that for F- it is 9-7=2 and for Na+ it is 11-2=9, but what about the charges?? I don't understand what effect do the charges make? If 9-7 then isn't it just simply F and not F-? Similarl...

Which element's 4+ ion would have the following electron configuration? [Kr]4d^10

Which is easier to remove an electron from, N or O? Why? Is it O? Which is easier to remove an electron from, B or Be? Why? Is it B?

Assign oxidation numbers for the following chemical equation: 2Al + 3H2SO4 ---> Al2(SO4)3 +3 H2 What was oxidized? What was reduced? My answer: Oxidation numbers going from the left side of the chemical eq to the right side.. Al: 0 H: +1 S: +6 O : -2 Al:...

Calculate the mass of Fe(OH)3 s) produced by mixing 50.0 mL of 0.153 M KOH (aq) and 25.0 mL of 0.255 M Fe(NO3)3 (aq), and the number of moles of the excess reactant remaining in solution.

Partial fractions of (2x^2 +8x+24)/(x+2)^2 (x^2 +4) I see a repeated quadratic and an irreducible quadratic..

How do I know the order of placing dots on the lewis structure? Please give an example.

You are given a colored solution that is labeled 1M. You need to prepare a solution from this that is 0.5 M. Describe your procedure in detail.