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Chemistry Questions and Answers November 27, 2019

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Problem 1 This compound only contains carbons and hydrogens. A. Determine the M peak (Which mz peak represents the M peak). B. Determine the chemical formula. Determine the degrees of unsaturation. What functional group does this compound contain C. Identify the structure for the M peak and the base peak (tallest peak). Hint Look for the most

Problem 2 This compound contains 1 oxygen and is an ether. A. Determine the M peak (Which mz peak represents the M peak). B. Determine the chemical formula. Determine the degrees of unsaturation. C. Identify the structure for the M peak as well as the peaks at 41 and 57 mz. ,100 80 60 40 20 10 20 30 50 40 60 70 80 90 100 mz Relative Intensity

Problem 3 This compound contains carbon, hydrogen, and oxygen. The M peak is at 88 mz. A. This compound loses a fragment very easily to form the peak at 70 mz. What has been lost B. Determine the chemical formula. Predict the structure for the M peak C. Predict the structures for the peaks at 57, 41, and 29 mz. ,100 80 60 40 201 10 30 40 50 60 70

Glacial Acetic Acid is a minimum of 96% acetic acid by mass. Calculate the molarity of a 98.72 (m/m) % acetic acid solution given that the solution density is 1.05 g/mL. Glacial Acetic Acid is a minimum of 96% acetic acid by mass. Calculate the molarity of a 98.72 (m/m) % acetic acid solution given that the solution density is 1.05 g/mL.

The solubility of Barium Hydroxide is listed in the solubility tables as 5.60g of Barium Hydroxide Octahydrate at 15C in 100 mL of water. Show your work for the following calculations. Give all values to three significant figures. How many moles of Barium hydroxide is this? How many grams of Barium hydroxide can dissolve in 100mL of water at 15C?

Consider the endothermic reaction 2H2S(g) SO2 (g) 3S(s) 2HO(g) at equilibrium. Match each change with the corresponding effect. Premise 1 2 3 4 5 6 7 Adding S Decreasing the volume of the container Lowering the reaction temperature Increasing the pressure of SO2 Decreasing the pressure of HS Increasing the pressure of HO Adding N gas
Consider the endothermic reaction 2H2S(g)+S02(g)3S(s)+2H20(g) at equilibrium. Match each change with the corresponding effect. Premise Response Drag and drop to match 1 Adding S ? Pressure of H2O decreases -A 2 Decreasing the volume of the container7 B Pressure of H2O increases 3 Lowering the reaction temperature -C Pressure of H20 increases 4 Increasing the pressure of SO2 D Pressure of H2O decreases = 5 Decreasing the pressure of H2S - No effect Increasing the pressure of H20 -F No effect 7Adding N2 gas -) G Pressure of SO2 increases -

Describe the reaction that takes place when starch is hydrolyzed by an enzyme What is the product of starch hydrolysis What is the name of the enzyme in saliva that would hydrolyze starch