Physical Chemistry Answers

The delta H for reaction (4) is negative. Could you increase the yield of glucose 6-phosphate by 

a) increasing the temperature 

b) decreasing the temperature 

c) adding a catalyst 

Glucose-1-phosphate (G1P) is converted into glucose-6-phosphate (G6P) by the enzyme phosphoglucomutase according to the equation: 

Glucose-1-phosphate ⇋ Glucose-6-phosphate

At equilibrium, [G1P] = 3.0*10^-3 mol L^-1 and [G6P] = 5.8*10^-2 mol L^-1. What is the value of the equilibrium constant? 

Ethanol trapped in a gel is a common camping fuel. The thermochemical equation for the combustion of ethanol is : 

C2H5OH (l) + 3O2(g) → 2CO2(g) + 3H2O(g)

The ΔH for reaction (3) is -1368 kJ mol-1. What mass of ethanol must be burned to supply 350 kJ of heat? 

How many molecules are in 5 moles of ammonia, NH₃?

 How many grams are in 238 moles of arsenic? The atomic mass of arsenic is 33 g.

A point charge has a charge of 2.50 X 10-11 C. At what distance from the point

charge is the electric potential a) 90.0 V? b) 30.0 V? Take the potential to be

zero at an infinite distance from the charge.

Note: Show your free body diagram (FBD) and solutions accurately,

systematically and orderly with the standard unit, and express it into

prefix word if possible.

With the help of two examples, compare the terms basicity and nucleophilicity.

100 mL of a water sample consumed 10 mL of N/50 H

2

SO

4

during titration using

phenolphthalein as

an

indicator. Few drops of methyl orange were added to the same

solution and titration was continued. The yellow colour of the solution just turned orange

after addition of another 21 mL of the same acid solution. Ca

lculate the type and extent

of alkalinity present in the water sample.

What could be the disadvantages of using this

water sample source in boiler?

100 mL of a water sample consumed 10 mL of N/50 H

2

SO

4

during titration using

phenolphthalein as

an

indicator. Few drops of methyl orange were added to the same

solution and titration was continued. The yellow colour of the solution just turned orange

after addition of another 21 mL of the same acid solution. Ca

lculate the type and extent

of alkalinity present in the water sample.

What could be the disadvantages of using this

water sample source in boiler?

Industrially, vanadium metal ,which is used in steel alloys,can be obtained by reacting vanadium oxide with calcium at high temperatures:

In one process,1.54×10^3g of V2O5 react with 1.96×10^3g of Ca.

Calculate the theoretical yield of V....