1. A double blind, randomly allocated medical experiment is comparing two possible treatments for an immune-system disorder. Patients are randomly assigned treatments.

1. Show that Treatment B has the better response rate.

There is an experiment that demonstrates the first law of thermodynamics by using a tin can. The problem is I don't understand why there is a work done. The link to that video is https://youtu.be/jNPUCmkKiE4?list=WL&t=180 . Can someone explain to me why the tin can suddenly imploded?

When John Tyndall attempted to repeat Louis Pasteur’s experiment using the flask shown below, he found that microbial growth sometimes occurred even when the growth medium was boiled for an extended time. Explain why he obtained results that conflicted with Pasteur’s results.

In Part B of the experiment you uses a weak base, sodium bicarbonate to completely convert a weak acid to a salt. Why was sodium bicarbonate able to completely convert the acid whereas many weak bases would have left some unreacted acid because of the equilibrium?

In an experiment similar to this one, and done very carefully so that the yield was essentially 100%, 0.05 g of iron reacted with hydrochloric acid to give 0.145 g of a chloride FeCln. There are two chlorides of iron, ferrous chloride, FeCl2, and ferric chloride, FeCl3. Which one was obtained?

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).