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Question- The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. But given the same kinetic energies, a lighter molecule will move faster than a heavier molecule.
Where R=8.314 J/(mol•K) and ? is molar mass in kilograms per mole. Note that a joule is the same as a kg•m2/s2.
What is the rms speed of N2 molecules at 361K?
What is the rms speed of He atoms at 361 K?
Please answer only if you are 100% confident
Bh3 No3 O3 PCl5 SF6 How many of the molecules have no dipole moment. Which of the molecules obeys the octet rule
What is the pH of a solution made by mixing 100.00 mL of .20 M HCl with 50.0 mL of .10 M HCl. Assume that the volumes are additive
what is the mole fraction and b) what is the molality of this compound in the solution? the molar mass of the unknown compound is 45.0 g/mol
A gaseous mixture of NO2 and N2O4 is in equilibrium. If the concentration of N2)4 is 5.3 x 10^-5 M, what is the concentration of NO2? 2 NO2 (g) ==> N2O4 (g) Kc = 170
What concentration of CO3^2- is need to initiate precipitation. Neglect any volume changes during the addition.
in new york you had a balloon inflated with helium he and you measured its temperature which was 89.6 degree f and its
benzoic acid and dissolve it in 1ml of diethyl ether. this is then extracted with 1 ml of water. the ether is removed, dried with sodium sulfate and ether evaporated yielding 30 mg of benzoic acid. what is the kp value for the ether water system.
For which of the following equilibria does Kc correspond to an acid-ionization constant, Ka? NH3(aq) + H3O+(aq) NH4+(aq) + H2O(l) NH4+(aq) + H2O(l) NH3(aq) + H3O+(aq) NH4+(aq) + OH-(aq) NH3(aq) + H2O(l) HF(aq) + OH-(aq) H2O(l) + F-(aq) F-(aq) + H2..
What is the change in internal energy (in J) of a system that absorbs 0.524 kJ of heat from its surroundings and has 0.344 kcal of work done on it
Which one of the following is a poor aprotic solvent for an SN2 reaction? A) CH3SOCH3 (DMSO) B) CH3OH C) C6H6 D) CH3COOH E) CH3CN
The absolute configurations for cis-1,2-dimethylcyclopropane would be a) (R,R) b) (S,S) c) either (R,R) or (S,S) d) (R,S)
When 1.7 g sodium nitride is heated it forms sodium metal and nitrogen gas. How many grams of each are formed?
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