2. A teaching assistant at a university needs 28% acidsolution for her class's lab experiment. There isn't anyof this concentration in stock, but the lab has 50 litersof 22% acid solution, as well as a lot of 32% acidsolution. How much of the 32% acid solution should theteaching assistant add to the 22% acid solution toobtain a solution with the desired concentration?Show your work for full credit.

Answered: Image /qna-images/answer/cbfb2c9a-3c5a-4aea-bcb6-ab09e10038a0.jpg

Answered: 2. A teaching assistant at a university…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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4. Elizabeth needs 2 1/3 cups of sugar for vanilla cake and 1 3/4 cups of sugar for chocolate cake. a. How many cups of sugar does Elizabeth need in all? Use a model to solve. Explain your solution. b. How much more sugar does Elizabeth need for vanilla cake than for chocolate Cake? Use a model to solve. Explain your solution.
Madeline packed some cookies into two bottles A and B. She packed 3/4 as many cookies into Bottle A as Bottle B at first. After transferring 24 cookies from Bottle A to Bottle B, there are now 1/4 as many cookies into Bottle A as Bottle B. How many more cookies were there in Bottle B than Bottle A at first?
A recipe for chicken marsala with figs and walnuts serves 10 and calls for 1 1/2 cups of figs. You want to serve 90 guests (9 times the recipe). How many pounds of figs should you order if the Yield percent for figs is 98% and 1 cup of figs weighs 0.44 pounds?
1. A tank contains 100 gallons of brine made by dissolving 60 pounds of salt in water. Salt water containing 1 pound of salt per gallon runs in at the rate of 2 gal/min, and the mixture, kept unifom by stirring runs out at the rate of 3 gal/min. Find the amount of salt in the tank at the end of 1 hour.
3. How much of a 7% HCl acid solution needs to be mixed with how much of a 15% HCl acid solution so that you obtain 20 ml of a 12% HCl acid solution? Show your work
A 25% salt solution is mixed with a 55% salt solution. Which of the following are not possible for the percent concentration of the resulting solution? (Select all that apply.) 60% 5% 55% 43% 25% A coffee merchant combines coffee that costs $7 per pound with coffee that costs $4.30 per pound. How many pounds of each should be used to make 27 lb of a blend costing $6.05 per pound? $7 per lb coffee lb $4.30 per lb coffee lb Find the cost per ounce of a sunscreen made from 120 oz of lotion that cost $3.45 per ounce and 90 oz of lotion that cost $11.15 per ounce. $ per ounce Two planes are 1455 mi apart and are traveling toward each other. One plane is traveling 110 mph faster than the other plane. The planes pass each other in 1.5 h. Find the speed of each plane. slower plane mph faster plane mph A butcher has some hamburger that is 19% fat and some that is 11% fat. How many pounds of each should be mixed to make 80 lb of hamburger that is 13%…
2. Suppose a bacteria sample contains 1000 bacteria. 6 hours later, there are 2400 bacteria. Find how long it would take until the sample has 10,000 bacteria.

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