Answer for question 10? You obtain 1.8 g of an impure solid. You know that the sample contains 1.6 g of your desired compound. What is the maximum mass of your desired compound that you could recover from a recrystallization using 100 mL of Solvent A according to the below solubility table? Based on the solubility table shown in problem 9, what is the minimum volume (in mL) of solvent that would be needed to recrystallize 7.23 g of the...
You are given a light brown solid sample with the information that it is an impure sample of a phenol – you are tasked with its purification. You ask for information about the suspected impurities, but it seems no one really knows. So you ask for an IR spectra of the impure sample. Upon scrutinizing the IR spectrum carefully, you find that there is a small, but significant, signal at about 1700 cm-1, a small broad peak at about 3000...
How do you know which measure of central tendency is appropriate? How are the measures of central tendency found using SPSS?
Which metal is more noble Fe or Cr? How do you know?
Did the solid soap you made contain excess base? Explain how you know.
Consider the following reactions and determine which specie will be oxidized and which one will be reduced, also, determine the reducing agent, the oxidizing agent, which specie will be found at the anode and which one will be found at the cathode. How many moles of electrons are transferred and how many Faradays of energy will be required? 1. MnO, + NO, Mn + NO, Species oxidized Reduced Reducing Found at the Oxidizing Agent Agent Found at the anode cathode...
ws Time 0rv) Time (hrs) IV a) Which graph illustrates someone with diabetes? How do you know? b) Which graph illustrates someone who secretes too little glucagon? How do you know? c) Which graph illustrates someone with a healthy pancreas? How do you know? Part C-Short Answers ICOM-10 marksl 1. Explain how the intergumentary system (organ system consisting of skin, hair, nails and exocrine glands) works together with the circulatory system to maintain homeostasis Time 0rv) Time (hrs) IV a)...
How do you know which hydrogen on Camphor belongs to which peak in H NMR 1.1 1.0 0.9 0.8 ppm 18.92 30.58 21.84 28.66
Do you need to know the exact mass of solid borax you measure? a) Yes, because the concentration of borax is part of your ICE table. b) No, because a supersaturated solution will need excess borax. c) Yes, because you must calculate the concentration of the solution using the moles of borax and volume of solution. d) No, because all borax solutions are saturated solutions.
What is “old” to you? How do you know when you are old? How do you feel about old people? Why?