The rate of effusion of Br_2(g) compared cl_2(g), at the same temperature, would

Question

The rate of effusion of Br_2(g) compared cl_2(g), at the same temperature, would be greater less the same impossible to predict The average kinetic energy of Br_2(g) compared Cl_2(g) at the same temperature, would be greater less the same impossible to predict The root mean square speed of Br_2(g) compared to Cl_2(g), at the same temperature, would be greater less the same 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 1.68 atm 2.50 atm 3.75 atm 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 less greater the same impossible of predict In 0.10 M Ba(NO_3)_2 the [NO_3^-] is 0.10 M 0.20 M 0.30 M

Explanation / Answer

15. rate of diffusion is inversily proportional to molarmass of compound.

so that ,

answer: B

16. average kineticenergy is inversily proportional to molarmass of compound.

answer: B

17. RMS velocity is inversily proportional to molarmass of compound.

answer: B

18. Pi = iCRT

   2.5 = 2*0.05*0.0821*T

   T = 304.5 k

so that,

Pi = 4*0.05*0.0821*304.5 = 5 atm

answer: D

19.   heat lost by Zn = heat gained by water

     mZn*s*DT = mwater*s*DT

    10*s*(100-23) = 10*4.18*(23-20)

S = specific heat of Zn = 0.163 j/k.g

answer: A less

20. [NO3^-] = 0.1 M

answer: A

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