31. Determine the empirical formulas for the following compounds: (a) caffeine, C_(8)H_(10)N_(4)O_(2) (b) sucrose, C_(12)H_(22)O_(11) (c) hydrogen peroxide, H_(2)O_(2) (d) glucose, C_(6)H_(12)O_(6) (e) ascorbic acid (vitamin C), C_(6)H_(8)O_(6)

Consider the reaction $H_{2}(g)+I_{2}(g)\Leftrightarrow HI(g)$ with an equilibrium constant of 46.3 and a reaction quotient of 525.Which direction will the system shift to? The equilibrium will shift to the left to favor the reactants. The equilibrium will shift to the right to favor the products. The equilibrium will not shift in any direction. The equilibrium will shift to the forward reaction.

What best describes what the pH number indicates about a solution? A. What the $K_{a}$ constant is B. How acidic the solution is C. What its ionic strength is D. How strong the acid is

According to Le Chateller's principle a change in pressure affects the chemical equilibrium of the reaction system under what condition? The reactants and the products are in the solid phase. The reactants and the products are in the liquid phase. Some of the reactants or the products are in the gaseous phase. Some of the reactants or the products are solid, and some are liquid.

Which method can chefs use to change orange juice to resemble caviar? A. emulsification B. deconstruction C. flash freezing D. sous-vide E. spherification

Where do the two noteworthy peaks of carboxylic acids appear in 'HNMR spectra? A Between 10 and 12 ppm for the OH proton and $2-2.5$ ppm for the protons on the a carbon to the carboxy group. B Between 6 and 9 ppm for the OH proton and $2-2.5$ ppm for the protons on the a carbon to the carboxy group. C Between 10 and 12 ppm for the OH proton and $1-1.5$ ppm for the protons on the a carbon to the carboxy group. D Between 6 and 9 ppm for the OH proton and $1-1.5$ ppm for the protons on the a carbon to the carboxygroup.

Question 19 (0.5 points) Gases behave ideally under what conditions? High Temperature and Low Pressure High Temperature and High Pressure Low Temperature and Low pressure Low Temperature and High Pressure Question 20 (0.5 points) Gases deviate from Ideal behavior under what conditions? High Temperature and Low Pressure High Temperature and High Pressure Low Temperature and Low pressure Low Temperature and High Pressure

Calculate the percentage by mass of lead fly $Pb(NO_{3})_{2}$ 336 MS 6503 The

A 40.00 mL sample of 0 .1000 M diprotic malonic acid is , titrated with @.071 M KOH. What volume KOH must be added to give a pH of 5.62? $K_{a1}=1.42\times 10^{-3}$ and $K_{a2}=2.01\times $ $10^{-6}$ Show all of your work on your scratch paper and upload it as a comment to this quiz assignment.

If flammable liquids are on fire, which class of fire extinguisher would you need to put out the fire? A Class B B Class C C Class D D Both B and C

What are the four components required to make a fire possible? A Oxygen, wood, plastic, and a chemical chain reaction B Fuel, heat, spark, and a fire tetrahedron C Ignition, oxygen, air, and contact with a heat source D Oxygen, heat, fuel, and a chemical chain reaction