During a column chromatography laboratory experiment, a column is to be run with hexane first, then a hexane/ dichloromethane mixture, then 100% dichloromethane. What will happen if you mix up the hexane and dichloromethane? How can you fix the problem?
In: Chemistry
In: Biology
Read four digits from the random numbers table. note the number of odd digits in the selected numbers. Repeat the experiment 25 times. Obtain the probability distribution of the odd digits. Find mean and variance of the distribution
In: Statistics and Probability
Experiment ( preparation of tert-butyl chloride )
1- what is the purpose of washing tert-butyl chloride with saturated NaCl solution
2- describe a way to distinguish between an aqueous layer and an organic layer in separatory funnel.
In: Chemistry
What is the important role of sodium lauryl sulfate play in the adsorption of oil experiment? The materials includes cooking oil, chitosan and lauryl sulfate and different pH water solution. Can anyone explain in details? Thanks
In: Chemistry
In a coffee-cup calorimeter experiment, if we ignored the heat lost to the Styrofoam cup and the air, does this cause the heat gained by the total solution at the end to be too big or too small. Could you please explain.
In: Physics
You suspect there is a protein in blood that has antimicrobial properties. Design an experiment to isolate the protein and test it’s ability to inhibit bacterial growth. How would you determine if it is an antimicrobial peptide or a member of the complement family?
In: Anatomy and Physiology
You are asked to analyze the effect of the Bank of Canada's new interest rate policy on housing prices. Using a comparative static experiment, describe the steps you need to follow to produce a sound theoretical macroeconomic analysis.
In: Economics
1:
A) Describe isotonicity, hypertonicity, and hypotonicity. How does each affect the cell volume?
B) What is osmotic pressure? Describe a variable in the experiment which affected osmotic pressure and how it affected the osmotic pressure.
In: Anatomy and Physiology
Definition of the following A Case Study: A Survey: A Correlational Study: An Experiment: 2. Use CNN.com and FoxNews.com to find four articles from the last six months that represent each of the four research designs listed above.
In: Psychology