The following data was taken in a GC experiment: tr of air (non retained) = 33s, tr of benzene = 275s, tr of toluene = 342s. From the literature it is known that the partition coefficient of benzene for the stationary phase in your column and at your column temperature is 650. Calculate K for toluene.

True or false

1. Heat of reactions are always equal to DH

2. NaOH is hygroscopic substance, slowness in weighing and dissolution in water will result in an increase in the calculated heat of solution

3. In the heat of solution experiment changing NaOH to KOH will change the DH value

4. Heat of solution is always negative (exothermic)

1-In green plants and algae the red and blue wavelengths of light are predominantly used. Describe an experiment that can be used to test this. 100 marks

2-Describe either 1) peat bogs or 2) cloud forests and explain why they are important habitats for bryophytes. 100 marks

If 250 g of water is heated by 6 K during the experiment and the water-mass equivalent of the coil is 2.5 g, how many calories of energy has the water (and coil) absorbed? The specific heat capacity (using the archaic units of calories) is: 1 cal/(g K).

Plant physiology

You have done a genetic screen for a mutant plant line (Arabidopsis of course!) that can not use glutamate as a nitrogen source. Describe one experiment you will do to provide proof that your mutant is defective in nitrogen assimilation. Be specific and thorough with your answer.

You will have to experiment with using chmod on the folder and the file to come up with the following:

Find the chmod commands for both the folder and the file that you would use to give the minimum permissions for You (the owner) to be able to edit and change the file (and I don’t want to see 777! ? ) :
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Python program to simulate estimate the probability that a random chord on a unit-circle (radius one), exceeds the radius of the circle? Repeat the experiment of generating random chords 1,000 times. Record the estimate of the probability that the chord length exceeds the radius

Please use comments to help explain