Question5 DDT, an insecticide harmful to fish, birds, and humans, is pre duced by the following reaction: 2C,H,CI + CHOCI, CH,Cl, + H,O chlorobenzene chloral DDT In a government lab, 1142 g of chlorobenzene is reacted wish 485 g of chloral. a. What mass of DDT is formed, assuming 100% yield? b. Which reactant is limiting? Which is in excess? c. What mass of the excess reactant is left over? d. If the actual yield of DDT is 200.0 g, what is the percent yield?

3.

6. In one experiment, a mixture of 0.250 mol of methane gas was burned in 1.25 mol of ogen sina sealed container. Find the limiting reactant and calculate the theoretical yield of water produced. 2.34 g of water was actually produced in the experiment, what is the percentage yield? (9) CH,(g) + 02(9) Co,(g) + H20G) Reply... :

Calculate the protein count of 100 g of a food, with a total amount of proteinof 20 g and the following composition of amino acids for each g of protein: 200 mg oflysine, 125 mg valine, 182 mg glycine, 290 mg proline, and 43 mg leucine. TwoWhole eggs (100 g) contain 12.8 g of protein and 86 mg of leucine, 70 mg of lysine,66 mg of valine for every g of protein.

The great French chemist Antoine Lavoisier discovered the Law of Conservation of Mass in part by doing a famous experiment in 1775. In this experiment Lavoisier found that mercury(II) oxide, when heated, decomposed into liquid mercury and an invisible and previously unknown substance: oxygen gas. 1. Write a balanced chemical equation, including physical state symbols, for the decomposition of solid mercury(II) oxide (HgO) into liquid mercury and gaseous dioxygen. х10 2. Suppose 14.0 mL dioxygen gas are produced by reaction, at a temperature of 110.0 °C and pressure of exactly 1 atm. Calculate the mass of mercury(II) oxide that must have reacted. Be sure your answer has the correct number of significant digits.

(5.5, 5.7 & 5.8) Classify the following reaction. Ba(NO3)2(aq) + K₂SO4(aq) --> O acid-base reaction O gas-forming reaction O decomposition reaction O precipitation reaction

A 19.51 g sample of impure methylamine, which contains 72.58% (by mass) of CH;NH: , is reacted with 30.81 g of pure oxygen gas: 2.1 4CH, NH,(2) + 90,(8) - 4C0,(8) + 10H,0(?) + 2N;(8) 2.1.1 What is the percentage yield of this reaction if 5.54 g of nitrogen gas is collected? 2.1.2 In another experiment, this impure methylamine was used as follows: • An unknown mass of the impure compound is dissolved in enough water to make 500.0 m of solution. • 20 ml of this solution was transferred by pipette to a clean 250 ml volumetric flask and made up to the mark. • The molarity of the CH;NH; in the final solution was determined to be 0.103 M. Determine the mass of CH;NH; present in the original amount of impure compound used make this solution.

8.8

6. 7 8. 9. 10 11 12 13 14 A chemist prepares a solution of potassium iodide (KI) by measuring out 3.0 × 10“ umol of potassium iodide into a 350. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in umol/L of the chemist's potassium iodide solution. Round your answer to 2 significant digits. alo Ar μ mol x10 Submit Assignment Continue 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center | Accessibility Show All IMG-4472.jpg IMG-4471.jpg IMG-4467.jpg IMG-4464.jpg IMG-4474.jpg MacBook Air DII F12 80 F9 F10 F11 F7 F8 F5 F6 F3 F4 F2 %23 $ 4 5 6 7 8 9 3 P 4.

If an automobile travels 225 mi with a gas mileage of 20.5mi / gal,how many kilograms of CO{2} are produced? As- sume that the gasoline is composed of octane, C8H18(l) whose density is 0.69g / mL (b) Repeat the calculation for a truck that has a gas mileage of 5mi /gal