Physical Chemistry Answers

What is the concentration of HI in the equilibrium below.
H2 + I2 -------+ 2HI , The kc value is 5.43, the concentration of H2 and I2 are 0.500 each respectively. Find the concentrations of H2, I2 and 2HI.

Steve races to the nearest taco stand at lunchtime and sees that his pedometer recorded his peak speed at 90.5 cm/s. What was Steve's peak speed in kilometers per hour?

A metal packs with 68% efficiency. If the edge length of the unit cell is 0.291nm, find the colume of all the atoms in this unit cell in cm^3.

A pycnometer is a glass flask with a tight fitting glass stopper that is used to obtain the volume of a liquid with high accuracy. A pycnometer has a mass of 25.151 grams when empty, and a mass of 42.481 grams when completely filled with water. The pycnometer has a mass of 47.629 when completely filled with an unknown liquid. What is the density in g/cm³ of the unknown liquid? Assume the density of water is 1.000 g/cm³.

Sample problem: A particular sample held in a cell of 1 cm path length has an absorbency of 0.52 at 645nm, 1.02 at 663nm and 0.02 at 700m,. What are the concentrations of chlorophylls `a' and `b' in the sample? Do not forget to subtract the readings at 700nm from those at 645 and 663nms! (Answers are: 11.4ug/ml Chl a, 6.8ug/ml Chl b). I do not know how to get these answers.

a package of 8 apples has a mass of 1.00 kg. what is the average mass of 1 apple in grams?

01 (a) What are isotopes. isobar and isotone? Describe the method by which isotopes can be separate from one another

How many significant numbers is in the following of 300,00.0