What is the maximum number of electrons that can occupy each of the following su

Question

What is the maximum number of electrons that can occupy each of the following subshells? (a) 3p, (b) 5d, (c) 2s and 4f Given the following reactions N_2(g) + O_2(g) rightarrow 2NO(g) Delta H = +180.7 kJ 2N_2O(g) rightarrow O_2(g) + 2N_2(g) Delta H = -163.2 kJ the enthalpy of reaction for 2N_2O(g) rightarrow 2NO(g) + N_2(g) ____ is kJ. A) 145.7 B) 343.9 C) -343.9 D) 17.5 E)-145.7 In the reaction below, Delta H degree_f is zero for _______. Ni(s) + 2CO(g) + 2PF_3(g) rightarrow Ni(CO)_2(PF_3)_2(l) A) Ni(s) B) CO(g) C) F_3(g) D) NI(CO)_2(PF_3)_2(l) E) both CO(g) and PF_3(g) Arrange the following kinds of electromagnetic radiation in order of increasing wavelength: red light, green light, infrared, ultraviolet light, x-ray.

Explanation / Answer

12.(a)There are three 3p
orbitals, each of which can hold up to 2 electrons, for 6 total electrons.
(b)There are five 5d orbitals, each of which can hold up to 2 electrons, for 10 total electrons.
(c)There are one 2s orbitals, each of which can hold up to 2 electrons, for 2 total electrons.
(d) There are seven 5f orbitals,each of which can hold up to 2 electrons,for 14 total electrons.

13.The Hess law states that the final state that regardless of the multiple stages or steps of a reaction, the total enthalpy change for the reaction is equal to the sum of the heats of reaction for any set of reactions which in sum are equivalent to the overall reaction.

N2(g) + O2 --> 2NO(g) H= 180.7kj
2N2O(g) --> 2N2(g) + O2 H=-163.2kj

By adding both the equation:

N2+O2+2N2O===2NO+2N2+O2

H for 2N2O===2NO+N2= 180.7 -163.2=17.5kj
14.(a) option is correct.

Ni (s), because it is an element in its most natural state.

15.order of electromagnetic radiation in order of increasing wavelength is as follows:

X-rays<UV light<Green light<Red light<Infrared

Wavelength of X-rays= 0.1 to10nm

Wavelength of UV light= 10-400nm

Wavelength ofGreen light=510nm

Wavelength of red light=650nm

Wavelength of Infrared=700nm to 1mm

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