Which of the following equations listed below corresponds to the standard molar

Question

Which of the following equations listed below corresponds to the standard molar enthalpy of delta H^0 f for NH_4 NO_3? NH^+_4 (aq) + NO_3 (aq) rightarrow NH_4 NO_3 (s) NH_3 (g) + HNO_3 (g) rightarrow NH_4 NO_3 (s) N_2 (g) + 2 H_2 (g) + 3/2 O_2 (g) rightarrow NH_4 NO_3 (s) 2 N_2 (g) + 4 H_2 (g) + 3 O_2 (g) rightarrow 2 NH_4 NO_3 (s) 2 N (g) + 4 H (g) + 3 O (g) rightarrow NH_4 NO_3 (s) Which of the following regions of the electromagnetic spectrum have longer wavelengths than visible light ? infrared radiation ultraviolet radiation microwave radiation 1 only 2 only 3 only 1 and 2 1 and 3 If a radio wave has a frequency of 17.0 MHz, what is the wavelength of this radiation? (1 MHz = 1 times 10^6 s^-1) 5.10 times 10^15 m 5.67 times 10^-2 m 5.88 times 10^-2 m 1.76 times 10^1 m 1.76 times 10^6 m For which of the following transitions would a hydrogen atom absorb a photon with the longest wavelength? n = 1 to n = 2 n = 4 to n = 8 n = 5 to n = 4 n = 7 to n = 6 n = 6 to n = 7 Only one set of quantum numbers listed below is a correct set. Which one? (n, I, m_1, m_s) 3, 2, 0, 1/2 2, 2, -2, 1/2 3, 3, -3, 1/2 4, 4, -3, 1/2 none of these The possible values of the magnetic quantum number, m, of a 3d electron are: 1, 2, 3 0, 1, 2 -2, -1, 0, 1, 2 -1, 0, 1 none of these What is the ground state electron configuration of a mercury atom? [Xe]6s^26d^10 [Kr]5d^10 6s^2 [Xe]4f^14 5d^10 6s^2 [Xe]5d^10 6s^2 [Kr]4d^10 4f^14 6s^2 Which element has the following ground slate electron configuration? B O C Be Si

Explanation / Answer

30. The standard molar entropy of formation for NH4NO3 would be,

c. N2(g) + 2H2(g) + 3/2O2(g) ---> NH4NO3(s)

31. Electromagnetic region with wavelength longer than visible would be,

d. 1 and 2 only

32. wavelngth = c/v = 3 x 10^8/17.0 x 10^6 s-1 = 1.76 x 10^1 m

Answer : d. 1.76 x 10^1 m

33. longest wavelength for absorption would be for,

e. n = 6 to n = 7

34. correct quantum number is,

a. 3,2,0,1/2

35. Possble values for magnetic quantum number for 3d orbital are,

c. -2,-1,0,1,2

36. Ground state confirguration of Hg,

c. [Xe]4f14 5d10 6s2

37. The elemtn having the given configuration,

c. C

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