Chemistry, 17.03.2020 04:40 hannahking1869
(a) [10 pts] Using an electrochemical method, you measured the ascorbic acid of a 30.0 mL watermelon juice sample. A detector signal of 2.12 uA was observed. A standard addition of 1.00 mL of 24.9 mM ascorbic acid standard increased the current to 3.09 uA. Find the concentration of vitamin C in the watermelon juice.
Answers: 3
Chemistry, 23.06.2019 06:00
When hydrogen peroxide (h2o2) is added to potassium iodide (ki) solution, the hydrogen peroxide decomposes into water (h2o) and oxygen (o2). the chemical equation for the decomposition reaction is: 2h2o2—> 2h2o + o2. what is the role of the potassium iodide in this reaction? a. reactant. b. product. c. precipitate. d. catalyst.
Answers: 1
Chemistry, 23.06.2019 10:30
How is it possible for someone to put an ear to a wall and hear someone in the next room? a.sound waves can travel though solids. b.the waves travel from room to room via air. c.there must be some air in the wall so the sound can travel through it. d.sound waves change to electromagnetic waves and then back again.
Answers: 1
Chemistry, 23.06.2019 13:00
Sort these isotopes by whether they are most likely to undergo fusion or fission. hydrogen-3, uranium-233, plutonium-239, hydrogen-1, helium-3, plutonium-241
Answers: 2
Chemistry, 23.06.2019 17:00
Using this reversible reaction, answer the questions below: n2o4 2no2 (colorless) (reddish-brown) -as the temperature increased, what happened to the n2o4 concentration? -was the formation of reactants or products favored by the addition of heat? -which reaction is exothermic? right to left or left to right? -if the change of enthalpy of this reaction when proceeding left to right is 14 kcal, which chemical equation is correct? n2o4 2no2 + 14 kcal n2o4 2no2, hr = +14 kcal n2o4 + 14 kcal 2no2 n2o4 2no2, hr = -14 kcal
Answers: 1
(a) [10 pts] Using an electrochemical method, you measured the ascorbic acid of a 30.0 mL watermelon...
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