Physical Chemistry Answers

We know that air is a mixture and a compound because?

Write the expression and explain the uncertainty principle

With example explain the energy calculation for butadiene

Explains the quantum tunneling effect

Exaplain the quantum tunneling effect

In a binary liquid system, the excess molar volumes of species 1 and 2 at a constant temperature of 25ºC is represented by the following equation:

V^E=x₁x₂[-1.026-0.220(x₁-x₂)] in cm³/mol

Given that the pure species molar volume V₁ = 40.44 cm³/mol and V₂ = 116.3 cm³/mol, you desire to form from 1000 cm³ of each pure species 1 and 2 a mixture at 25ºC.

1.  Calculate the mole fraction of species 1 in the mixture. (3)

A container with volume 71.9 mL contains water vapor at a pressure of 10.4 atm and a temperature of 465oC. How many grams of the gas are in the container

Me3Bi +Br2

Write the equivalences that this balanced thermochemical equation implies

PCL3(g)+CL2(g)>PCL5(g)∆H=-87.9KJ

A recently graduated chemistry student got employed as a secondary school teacher. His task was to design some interesting experiments that involved computing, maths and chemistry to be displayed at the open day to attract more students to choose science.

His experiments involved mixing some chemicals and observing the colour change. He noticed that if one of the reactant's volume was varied, the time taken for colour of the solution to change also varied. So he obtained the results and tabulated them.  Using these data, explain what important information can be calculated. 

Time for the colour to change: 1m20s, 1m10s, 50s, 45s, 35s, 30s, 25s, 22s

Volume of reactant: 1, 2, 3, 4, 5, 6, 7, 8