Select all of the following that would be soluble in the water layer of an extraction that utilizes water and dichloromethane as its liquid layers: calcium carbonate methoxyethane sodium bicarbonate diethyl ether O toluene Select all of the following that would be soluble in the dichloromethane layer of an extraction that utilizes water and dichloromethane as its liquid layers: Ocyclopentane sodium chloride Oethoxypropane methylcyclohexane Dithium acetate What is brewing tea in water an example of? O solid-liquid extraction liquid-liquid extraction O none of the above O recrystallization O all of the above

Think about the situation where you are investigating the relationship of study time vs. exam grade.a. Which variable would be on the x-axis (and why)?b. Which variable would be on the y-axis (and why)?c. Would you expect the slope to be positive or negative (and Why)? 2) Contrast and compare interpolation with extrapolation. Which is “safer” to use and why?3) Look up how “the best fit straight line” is constructed. The term “Least squares” should be in your explanation.4) If I plot some data and end up with a r2 of (-) 0.99, is my plot useless? Explain.

Please do D, E, and F

Find the answer please.