molar solution, rutherford question

49) which of the following is the correct interpretation of the results of Rutherford's experiments in which gold atoms were bombarded with alpha partcles. a) Atoms have equal numbers of positive and negative charges b) the electrons in atoms are arranged in shells c) neutrons are at the center of an atom d) neutrons and protons in atoms have nearly equal mass e) the positive charge ofan atom is concentrated in a small region 50) A 0.1 M solution of which of the following ions is orange? a) Fe(Hsub2O)sub 4^2+ b) Cu(NHsub3)sub4^2- c) Zn(OH)sub4^2- d) Zn(NHsub3)sub4^2+ e) Crsub2Osub7^2-

Equilibrium

4 HCl + O 2 > 2 Cl2 + 2 H2O HCl is at 2.30 atm, O2 is at 1.00 atm and both react at 750 K. Equlibrium pressure of Cl2 is .93 atm. How do you go about finding Kp at 750 K?

Concentration and equilibrium

at 1495 degrees Celcius Kc for H2 + Br2 > 2HBR = 3 x 10 to the 4th power. H2 = .10 M Br2 = .20M What eqation(s)would I use or steps would I take to find the concentration of HBr?

balancing redox equations by the oxidation number method

2KMnO4 + 5H2O2 + 6HCl --> 5O2 + 2MnCl2 + 8H2O + 2KCl I need to calculate the balanced NET IONIC equation for the above reaction. I've been using the oxidation number method and determined H2O2 is the reducing agent and KMnO4 is the oxidizing agent. Mn gained 5 electrons, but I'm not sure how many electrons Oxygen gained, I'm thinking one electron but the two different oxygen oxidation numbers in the products are throwing me off. I know I need to make the electrons lost equal the electrons gained. My problem is that I'm not sure about the number of oxygen electrons gained and then I'm not sure on which compounds containing oxygen I should apply the coefficient to. Am I even using th... click for more

Equilibrium Concentrations

At 2400K, Kc=2.5 x 10 -3rd power. Equilibrium is obtained at 2400K starting with a reaction mixture of 0.20 mil of N2 and 0.20 mil of O2 in a 5.00 L vessel. What equations or processes would I used to find the concentrations in moles per liter for N2, O2, and NO?