The rate effusion of Br_2(g) compared to Cl_2(g), at the same temperature, would
ID: 534832 • Letter: T
Question
The rate effusion of Br_2(g) compared to Cl_2(g), at the same temperature, would be A) greater B) less C) the same D) impossible to predict The average kinetic energy of Br_2(g) compared to Cl_2(g), at the same temperature, would be A) greater B) less C) the same D) impossible to predict The root mean square speed of Br_2(g) compared to Cl_2(g), at the same temperature, would be A) greater B) less C) the same D) impossible to predict A 0.05 M aqueous sodium bromide solution has an osmotic pressure of 2.50 atm. At the same temperature, a 0.05 M aluminum chloride solution would have an osmotic pressure of A) 1.68 atm B) 2.50 atm C) 3.75 atm D) 5.00 atm The specific heat of water is 4.18 J/g degree C. When equal masses of zinc at 100 degree C and water at 20 degree C are combined in a calorimeter, the final temperature is 23 degree C. Compared to water, the specific heat of zinc is A) less B) greater C) the same D) impossible to predict In 0.10 M Ba(NO_3)_2 the [NO_3^-] is A) 0.10 M B) 0.20 M C) 0.30 MExplanation / Answer
15.
r1/r2 = squar root of M2/M1
The efustion of Br2 is less the effustion of Cl2
B. Less
16. KE = 3/2 nRT
KE = 3/2( W/M )RT
KE is inversely proportional to molecular mass
The average kinetic energy of Br2 is less than the kinetic energy of Cl2
B. Less
17. Root mean squar velocity is inversely proportional to molecular mass
The root mean squar velocity of Br2 is less the the root mean squar velocity of Cl2
B. less
18.
P = iCRT
for NaBr ----> Na+ + Br-
i = 2
AlCl3 -------------> Al+3 + 3Cl-
i = 4
P1/P2 = i1*C1/i2*C2
2.5/P2 = 2*0.05/4*0.05
P2 = 2.5*2 = 5atm >>>>>answer D
20. Ba(NO3)2 -------------> Ba+2 (aq) + 2NO3-
0.1M 0.1M 2*0.1M
[NO3-] = 0.2M >>>>>answer B
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