n order to conduct an​ experiment,

5

subjects are randomly selected from a group of

49

subjects. How many different groups of

5

subjects are​ possible?

Explain what would happen if we began Charge-to-Mass Ratio of Electrons experiment with a dot on the CRT (cathode-ray tube) screen instead of a line?

For which experiment will you create a standard curve, using absorbancy, or a pre-defined scale?

a.Benedic'ts test

b.Iodine test

c.Biuret test

d.Sudan test

I want introduction, material, methods, procedures, resulting, discussions and one line of conclusion :Experiment of
Isolation of bacteria ( with the gram straining)
Course : plant pathology

1) Some etiolated seedlings develop hairs on their epidermis when exposed to dim light. Please Describe an experiment to test the hypothesis that a phytochrome is the photoreceptor for this effect?

Describe how the solvents worked as the mobile phase of the liquid chromatography experiment. Why was it necessary to use different concentrations of aqueous isopropanol in the step-gradient separation?

For calcite dissolution experiment, when you increase ionic strength from 0 (infinite diluted) to 0.1 m, how much does the solubility increase？

What is the percent yield of dibenzalacetone when 0.212 g of benzaldehyde and 0.058 g of acetone was used in the experiment? I got a 0.885 g of product in the end.