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Chemistry Questions and Answers November 18, 2019

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Below is the Sy1 reaction between tbutyl bromide and ammonia (NHa). Draw the missing curved arrow notation in the first and second boxes to reflect electron movements. In all three boxes, add lone pairs of electrons and nonzero formal charges. ,H H Br Br Br Add all lone pairs of electrons and nonzero formal charges. Draw the missing curved arrow

2. Calculate the amount (in mg) of Allura Red Dye that a consumer would obtain from an 8ounce serving of the drink that you studied. The molar mass of Allura Red Dye is 496.42 gmol. In one U.S. fluid ounce, there are 29.6 mL. 3. The FDAs acceptable daily intake for Allura Red Dye is 7.0 mgkg bodyweight per day. Calculate how many servings a 200lb
2. Calculate the amount (in mg) of Allura Red Dye that a consumer would obtain from an 8-ounce serving of the drink that you studied. The molar mass of Allura Red Dye is 496.42 g/mol. In one U.S. fluid ounce, there are 29.6 mL 3. The FDAs acceptable daily intake for Allura Red Dye is 7.0 mg/kg bodyweight per day Calculate how many servings a 200-lb person may have per day (or if you would like to, calculate how many servings you may have per day). In 1 kg, there are 2.20 lbs How many servings can a 5-year-old child, weighing 55-lb, drink in a day to remain below an acceptable daily intake of 7.0 mg/kg bodyweight? 4.

2. the reaction of ammonium bicarbonate, NH4HCO3, with acetic acid, HC2H2O, in vinegar can be described by the following chemical equation NH4HCO3(s) + HC2H3O2(aq) = NH4^+ (aq) + C2H3O2^- (aq) + H2O(l) + CO2(g) an experiment was performed to determine the volume of vinegar required to completely react to a known mass of NH4HCO3. the experimental

When diluting the pickle juice food sample for titration, is it important to know the final volume exactly Why or why not

The pipet used for transferring the pickle juice to the flask was dirty and consequentially some of the pickle juice stuck to the inside of the pipet and was not analyzed. Would the determined percentage of acetic acid in the food sample be higher or lower due to this error Explain your answer.

There was difficulty in determining the end point in the titration due to the color of the food sample and the titration was stopped before the true endpoint was reached. Would the determined percentage of acetic acid in the food sample be higher or lower due to this error Explain your answer.

There was difficulty in determining the end point in the titration due to the color of the food sample and the titration was stopped before the true endpoint was reached. Would the determined percentage of acetic acid in the food sample be higher or lower due to this error Explain your answer.

5. Phosphate ions are abundant in cells, both as the ions themselves and as important sub stituents on organic molecules. Most importantly, the pK, for the H,PO, ion is 7 20, which is very close to the normal pH in the body. H,PO, (aq) H,0(1) HPO, (aq) H,0 (aq) a. What should the ratio HPO,1H,PO, be to control the pH at 7.4 ,b. A typical total

Gallium sulfide is a compound that is used as a semiconductor in electronics. It is synthesized from elemental gallium and sulfur, according to the following balanced chemical equation (14 Points) 2 Ga (s)3 S (s) Ga2S3 (s) What is the theoretical yield (in grams) of Ga2S3 if 4.53 g of gallium reacts with 3.25 g of sulfur Given molar masses Ga

Seawater at the surface has a pH of about 8.5. (a) Which of the following species has the highest concentration at this pH H2CO3 HCO3 CO32 Explain. (b) What are the concentration ratios CO321IHCO3 and HCO31H2CO3 at this pH (c) In the deep sea, light levels are low, and the pH is around 7.5. Suggest a reason for the lower pH at the greater ocean