Physical Chemistry Answers

A gas mixture containing oxygen, nitrogen, and carbon dioxide has a pressure of 250 mmHg. if the partial pressure of oxygen is 50 mmHg and the partial pressure of nitrogen is 175 mmHg, what is the partial pressure of the carbon dioxide?

Suppose we have 8 distinguishable particles that have a total energy equal to 6 units. The distribution for this system are labelled (no, n1, n2 , n3 ). Calculate the number of microstates (W) for each of the following distributions; (a) ( 6, 0, 0, 2), (b) ( 5, 1, 1, 1), (c) (4, 2, 2, 0), (d) (2, 6, 0, 0)

What will be the number of microstates (W) when 10 molecules are equally distributed among five energy levels.What is the value of W if one molecule is removed from one state and added to another?

An aliphatic carboxylic acid reacts with an alcohol and the following equilibrium is established RCOOH+R'CH^2OH=RCOOCH^2R'+H^2O what is the number of constituents and the number of components in the system

If 17.3g of powdered aluminium are allowed to react with excess Fe2O3, how much heat is produced?

1. In acidic solution, dichromate ion oxidizes 0xalic acid, H2C2O4 (aq), to CO2 (g) in a reaction with Eocell =1.81V.

Cr2O72-(aq) +  3 H2C2O4(aq)  +  8H+(aq) →  2Cr3+(aq)  + 7H2O +  6CO2(g) ,

) Calculate the entropy change at a constant pressure of 1 atm when one mole of liquid 

NH3 at -40 is transformed to the gaseous state at 200 using the following data: ℃ ℃

Cp for NH3 (l) = 17.9 Cal K-1 mol-1 ; Cp for NH3(g) = (8.04 + 7.0 x 10-4 T + 5.1 x 10-6

T 2

 )Cal K-1 mol-1 ; Boiling Point of NH3 (g) = 239.7 K; ΔvapH239.7 = 5560 Cal mol-1

) In the solid state at 0 K, nitric oxide is capable of existing in two orientations such as 

NONO and NOON, which have equal probabilities. Calculate the molar entropy of 

NO at 0 K?

How many moles of NO(g) can be produced in the reaction of 3.00 mol NH3(g) and 4.00 mol O2(g) ? 

4 NH3(g) + 5 O2(g) = 4 NO(g) + 6 H2O(l)

A solution contains 20g of solute in 180g of solvent. If the solvent is water, what is the concentration of the solution in terms of mass by mass percentage

A. 11.%

B. 22.2%

C. 10%

D. 20%

Please show working