Physical Chemistry Answers

Explain the wavelength dependent photochemistry of benzene derivatives.

PA°equal to 200 torr and PB°equals to 100 torr calculate the composition of vapour of liquid solution containing A and B at 50 degree centigrade is the normal boiling point of solution?

How many grams are there in 7.40 moles of AGNO3

The burning of 5.08g of C6H6 releases enough heat to raise the temperature of 50g of water from 10.1℃ to 19.6℃. Calculate ΔH/mole.

At a temperature of 298 K, the molar enthalpy change for the conversion of red phosphorus to white phosphorus is 17.6 kJ mol-1. The molar heat capacities of red and white phosphorus are, respectively, 21.19 and 23.82 J mol-1 K-1. Calculate the molar enthalpy change at 198 K.

What is the method used to determine standard enthalpy of formation describe with the help of an example?

Illustrate the role of chemical kinetics for the deduction of reaction mechanism. What is
its role in particular? Does chemical kinetics alone help deduce the reaction
mechanism? If not, what are the other necessary criteria? Elaborate with examples.

The indicator methyl red has a pKHIn = 4.95, If the indicator is placed in a colourless buffer solution of pH = 4.55 what colour will the solution be?

The indicator methyl red has a pKHIn = 4.95. It changes from red to yellow over the pH range from 4.4 to 6.2.

If the indicator is placed in a colourless buffer solution of pH = 4.55, what percent of the indicator will be present in the acid form, HIn?

if the formula of a hydrated salt of barium is bacl2.xh2o. if 1.936g of this salt is treated with h2so4 and yields 1.846g of anhydrous baso4 then the value of x is...

In the given solution of this question on your website there's a step in which ratio of moles of baso4 and h2o is taken, so why is that done??