Physical Chemistry Answers

Which facts did you include in your response? Check all that apply.

Oxidation is the loss of electrons.

Reduction is the gain of electrons.

Oxidation increases the oxidation number.

Reduction decreases the oxidation number.

In an oxidation-reduction reaction, the electrons from the oxidized atom or ion are transferred to the atom or ion that is reduced.

0.0755 g of selenium vapours occoupying a volume of 114.2 mL at 700 and 185 mm of Hg. The vapours are in equilibrium as Se6(g)⇌3Se2(g). Calculate (i) Degree of dissociation of (Se=79). (ii) Kp. (iii) Kc.

.Assess the effect of bonding and non-bonding electron repulsion on the shape of molecules with references of water , ammonia and methane,

I built a conductivity meter from 9v battery, 3 pieces of electrical wire, light bulb, and put in solutions of salt,,baking soda, vinegar with cup of water. Light never came on but in salt water water swirled, turned brown, battery got hot. What did I do wrong?? Must take pics of each for the points.

I built a conductivity meter from 9v battery, 3 pieces of electrical wire, light bulb, and put in solutions of salt,,baking soda, vinegar with cup of water. Light never came on but in salt water water swirled, turned brown, battery got hot. What did I do wrong?? Must take pics of each for the points.

Two operators A and B are related as [A,B]=0 . How accurately can one measure the physical property corresponding to A, for a system in the eigenstate of B ? Justify your answer. Assume the eigenstate are non-degenerate.

Adiabatic reversible expansion of a monoatomic gas (M) and a diatomic gas (D) at an initial temperature Ti.
has been carried out independently from initial volume V1, to final volume V2. The final tempratre (Tm for monoatomic and Td for diatomic) attained will be
(b) Tm < Td <Ti
(c) Tm >Td >Ti
(a) Tm=Td>Ti
(d) Td <Tm <Ti

The emf of the cell
Ag(s) | AgCI(satd), KCI(0.05 mol dm-3)/AgNO3, (01 mol dm3) I Ag(s)
is 0. 31 V at 298.15 K. The mean activity coefficient of KCl is 0.817 and that ofAgNO3, is 0.723. Calculate
the solubility product ofAgCl at 25℃.

Explain the shapes of 1s and 2py orbitals of an atom with one electron ?

For a given reaction, the heat of reaction is exothermic. Which condition favors forward reaction & why ?

1. High temperature

2. Low temp

3. Moderate temp

4. No effect of temp