Why can the physical properties of an unknown substance be used to determine

the identification of the substance?

Design an experiment to determine if your salt is hygroscopic, deliquescent,

efflorescent, or none. Note: this design does not need to be exactly what is followed in

the lab. For full credit, a conscientious effort must be shown in your design.

In an experiment to measure the photon statistics of thermal light, the radiation from a blackbody source is filtered with an interference filter of bandwidth 0.1 nm centered on 500 nm, and allowed to fall on a photon-counting detector. Calculate the number of modes incident on the detector, and hence discuss the type of statistics that would be expected.

A particle is located in a 3D potential box. The box is physically cut in the middle and sent half of it to the moon. The remaining half box was stayed on the earth and then the box on earth is opened. What happens in the box on the moon which explanation gives the Copenhagen interpretation to this thought experiment. Is there any other interpretation for this case?

(Achem Lab)

I did the experiment that making soda's pH with citric acid and NaOH citrate and compared with original soda, but

They had similar initial pH but had different concentrations and equivalent point.

Why does the recreated buffer behave differently from the soda sample?

Thank you

You have isolated C57BL6 trophoblast stem cells and have propagated them on MEFs with heparin. To test for the success of your culture protocol, you are injecting the cells into a C57BL6 blastocyst. Once the pups are born, you notice that your experiment failed. Why? What was the expected outcome of this injection?

You are interested in using formc acid ( Pka = 3.75) as a buffer for your biochemical experiment

b) you decide to use formic acid acid to make 1.5L od 70mM buffer at the pH you selected in part a. Determine the concentrations of formic acid and its conjugate base that are required?

Suppose you are provided with an isolated nerve-muscle preparation in order to study synaptic transmission. In one of your experiments, you give that preparation a drug that blocks voltage-gated Ca++ channels: in another , you give tetanus toxin to the preparation. How will synaptic transmission be affected in each experiment?

Please i am writing up a practical report for the ;Reduction of benzophenone to corresponding alcohol(diphenylmethanol)using sodium borohydride,and the need the following;

1.Please state possible observations you are likely to get from these experiment

2.State possible errors and improvements

3.And then conclusions.

Thanks

What are the primary sources of error in an experiment where you are calculating the caloric content of food by using a calorimeter that could explain any differences between you data and the label infomation for the number of Calories per gram? (Hint: How do these sources of error relate to the assumption that Qlost=Qgained?)

A perfectly balanced coin is tossed, there is equal chance to get a head (H) or a tail (T ). Consider a random experiment of throwing SEVEN perfectly balanced and identical coins. Let S denote the sample space.

a) List the elements in S.

(b) Find the probability that there is three tails and four heads.