Reason 1: That the mixture is not homogeneous and each part does not have the same amount of compound that is recovered.
Reason 2: The conditions of each group were not the same and the results will not be the same.
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if all the groups in the class receive the same amount of the same mixture, each...
In gas chromatography, why, even though you injected a mixture containing the same volume of each component, the three eluted peaks, in the chromatogram, do not have the same intensity? Mention at least two good reasons for this behavior
Two experimental groups of the same genetic strain of mice are being used for toxicological experiments. Each group of mice is administered the same single oral dose of a xenobiotic and monitored for acute lethality. After 4 days, all of the mice in one group are dead and all of the mice in the other group are alive. Provide six explanations for the difference in susceptibility of these two groups of mice. (2 marks each, 12 marks total) 4. a)...
For each of the following situations, give the degrees of freedom for the group (DFG), for error (DFE), and for the total (DFT). State the null and alternative hypotheses, H0 and Ha, and give the numerator and denominator degrees of freedom for the F statistic. (a) A poultry farmer is interested in reducing the cholesterol level in his marketable eggs. He wants to compare two different cholesterol-lowering drugs added to the hen's standard diet as well as an all-vegetarian diet....
For each of the following situations, give the degrees of freedom for the group (DFG), for error (DFE), and for the total (DFT). State the null and alternative hypotheses, H0 and Ha, and give the numerator and denominator degrees of freedom for the F statistic. (a) A poultry farmer is interested in reducing the cholesterol level in his marketable eggs. He wants to compare two different cholesterol-lowering drugs added to the hen's standard diet as well as an all-vegetarian diet....
For each of the following situations, give the degrees of freedom for the group (DFG), for error (DFE), and for theotal (DFT). State the null and alternative hypotheses, Ho and H numerator and denominator degrees of freedom for the F statistic. and give the (a) A poultry farmer is interested in reducing the cholesterol level in his marketable eggs. He wants to compare two different cholesterol-lowering drugs added to the hen's standard diet as well as an all-vegetarian diet. He...
Two groups of children were shown a commercial. One group (the A/V group) was shown the ad with both audio and video; the second group (the video-only group) was shown only the video portion of the commercial. Following the viewing, the children were asked to recall 10 specific items from the ad. The number of items recalled correctly by each child is summarized in the accompanying table. The researchers theorized that "children who receive an audiovisual presentation will have the...
6. Suppose a small elementary school class has 12 students, and the teacher has 20 pieces of chocolate to give out. How many ways can the teacher distribute all the chocolate to the class if (15 points) (No need to calculate / simplify the result, just set up) a) there are no restrictions? b) each child must get at least one piece of chocolate? c) a certain child is to receive exactly 2 pieces of chocolate?
2. List major groups of minerals in earth's crust. Each group give one specific mineral name and its chemical formula. What is the most abundant minerals in the earth? What are most two highest abundant elements in the earth crust?
Separating a Mixture, Recrystallization, pre-lab assignment could you also explain why you chose that substance for the empty spaces and question marks EXPERIMENT 4 Pre-Lab Assignment Separating a Mixture, Recrystalliration Name Date 1. Complete the following flowchart which shows how to separate a mixture of sand, sodium chloride and acetanilide. Notice that after a separation process (a down arrow) the filtered solids are shown on the left and the filtrate (the liquid) is shown on the right. The terminal step...
Identify the additional amount of tax that will be due from the taxpayer on the dividends received in each of the scenarios below. TAX YEAR 2018 a. Masha (an individual taxpayer) owns 100 percent of Metro Fashion Corporation. In 2018, she receives a $100,000 dividend from the Corporation. Masha’s other sources of income this year are wages of $80,000 (thus, she is not considered a high income taxpayer). b. Tyson Corporation owns 100 percent of Lafayette Corporation, and both companies...