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Question 785371: What quantity of a 70% acid solution must be mixed with a 50% solution to produce 200 mL of a 60% solution?
Click here to see answer by josgarithmetic(39618)

Question 785642: A silversmith combines 40 oz of pure silver that costs $8.00 per ounce with 200 oz of a silver alloy that costs $3.50 per ounce. Find the selling price of the mixture.
Click here to see answer by Alan3354(69443)

Question 785670: A tank holds 40 liters of a chemical solution. Currently, the solution has a strength of 10%. How much of this should be drained and replaced with 50% solution to get a final strength of 30%?
Click here to see answer by stanbon(75887)

Question 748663: A particular metal ally A has 20% iron and another alloy B contains 60% iron. How many kilograms of each alloy should be combined to create 80 kg of 52% iron alloy
Click here to see answer by Megan-notamathgeekatall(1)

Question 786035: To clean a concrete driveway, a contractor needs a solution that is 30% acid , How many ounces of a 50% acid solution must be mixed with 15oz of a 21% solution to obtain a 30% acid solution?
Click here to see answer by josgarithmetic(39618)

Question 786193: if a chemist uses 77 milliliters of water, how many milliliters of reagent will she need to make 30% solution?
Click here to see answer by josmiceli(19441)

Question 786320: a 20-lb bag of cement contains 25% cement and 75% sand. How much pure cement must be added to produce a cement mix that is 40%?
I can't access my e-text to look up the procedure.

Click here to see answer by josgarithmetic(39618)

Question 786612: The radiator in a car is filled with a solution of 70 per cent antifreeze and 30 per cent water. The manufacturer of the antifreeze suggests that for summer driving, optimal cooling of the engine is obtained with only 50 per cent antifreeze. If the capacity of the raditor is 4.8 liters, how much coolant (in liters) must be drained and replaced with pure water to reduce the antifreeze concentration to 50 per cent?

Click here to see answer by josmiceli(19441)

Question 786696: a chemist has 2 solutions of HNO3. one has 40% concentrated and the other has 23% concentration. how many liters of each solution must be mixed to obtain 121 liters of a 29% solution?
Click here to see answer by DrBeeee(684)

Question 787043: if you have a 40% alcohol solution and a 70% alcohol solution, how much of each do you need to make 20 gallons of a solution that is 50% alcohol?
Click here to see answer by stanbon(75887)

Question 787041: a 10 pound bag of mixed candy contains 30% chocolate. How many pounds of the mix should she remove from the bag so that, when she adds just chocolate to the bag. she'll have a mixture that contains 60% chocolate?
Click here to see answer by stanbon(75887)

Question 787091: a chemist has two solutions of h2so4 one has a 40% concentration and the other has a 25% concentration how many liters of each solution must be mixed to obtain 62 liters of a 31% solution
Click here to see answer by wilft1(217)

Question 786090: a pharmacist needs to mix a 1% saline (salt) solution with 24ml of a 16% saline solutin to obtain a 9% saline solution. How many ml of the 1% solution must she use?
Click here to see answer by jimenez5061(1)

Question 788164: Keith wants to create a drink that is 40% juice.How much of 10% solution should he add to 10 milliliters of 100%juice to obtain 40%mix?
Click here to see answer by josmiceli(19441)

Question 788163: what weight of am alloy containing 10% silver must be melted with an alloy containing60% silver to obtain 10lbs of an alloy contain 40% silver
Click here to see answer by mananth(16946)

Question 788156: Hello sir.my 7 yrs son ask ? How to spell a l
Policman or policemen. Thanks
Click here to see answer by cubfann1976(1)

Question 788180: What volume of water must be added to 2 liters of 12% KCL to obtain a 4.0% KCL solution? what is the total volume of the solution?
Click here to see answer by josgarithmetic(39618)

Question 788193: A chemist wishes to mix a 15% acid solution with a 55% acid solution to obtain 80 quarts of a 50% acid solution. How many quarts of each solution should be mixed together?
Click here to see answer by josgarithmetic(39618)

Question 788263: A 90% acid solution is diluted with water to make a solution of 60% acid. When liters of water is added to dilute it again, the solution becomes 40% acid. How much water is added to the solution on the first instance? How much 90% acid was available at the start?
thank you very much~! :)
Click here to see answer by josgarithmetic(39618)

Question 788371: A 6.0% solution and a 13.0% solution of a drug are added to 200 mL of a 24.0% solution to make 1500 mL of a 12.0% solution. The following equations relate to the milliliters of the added solutions. The number of milliliters of the added solution are represented by x and y, respectively. Find x and y (to three significant digits) x+y+200= 1500 .06x+.12y+.24(200)=.12(1500)
can someone show me how to do this with steps

Click here to see answer by rothauserc(4718)

Question 788648: gummy bears sell for $3.50 per pound is to be mixed with jelly beans which sell for $5.50 per pound to obtain 6o pounds to sell at $4.00 per pound How many pounds of Jelly beans do you need? thank you!
Click here to see answer by josgarithmetic(39618)

Question 788611: Pure acid is to be added to a 10% solution to obtain 27 liters of a 20% acid solution. What amounts of each should be used?

What is my x and y and how do I come up with 2 system of equations?
Click here to see answer by KMST(5328)

Question 788841: Alan has 30 ounces of a 40% sugar solution. How much sugar should he add to make it a 45% solution?

Click here to see answer by stanbon(75887)

Question 788849: You need 325 mL of a 5% alcohol solution. On hand, you have a 25% alcohol mixture. How much of the 25% alcohol mixture and pure water will you need to obtain the desired solution?
Click here to see answer by josgarithmetic(39618)

Question 788859: You need 1425 mL of a 30% alcohol solution. On hand, you have a 5% alcohol mixture. How much of the 5% alcohol mixture and pure alcohol will you need to obtain the desired solution?
Click here to see answer by josgarithmetic(39618)

Question 788848: How many mL of 70% alcohol should be mixed with 20 mL of 20% alcohol to prepare 50% alcohol?
Click here to see answer by josgarithmetic(39618)

Question 788898: If a 32 oz. bottle of lemonade contains 10% lemon juice, how much pure lemon juice is in the bottle?
Click here to see answer by jim_thompson5910(35256)

Question 788861: A Pharmacist needs to find an order for a 3% solution. However only 1% and 6% solutions are in stock. How much of the 6% solution should be mixed with 70g of the 1% solution to get 3% solution.

Click here to see answer by josmiceli(19441)

Question 788888: You need a 90% alcohol solution. On hand, you have a 30 mL of a 40% alcohol mixture. How much pure alcohol will you need to add to obtain the desired solution?
Click here to see answer by josgarithmetic(39618)

Question 789063: how many liters of water do you add to a 51% saline solution to make a 36% saline solution
Click here to see answer by Alan3354(69443)

Question 789150: You need a 45% alcohol solution. On hand, you have a 80 mL of a 40% alcohol mixture. You also have 65% alcohol mixture. How much of the 65% mixture will you need to add to obtain the desired solution?
Click here to see answer by josgarithmetic(39618)

Question 789209: One alloy is 70% lead and 30% zinc, and another is 40% lead and 60% zinc. Find the amount of each alloy needed to make 240kg of an alloy that is 50% lead and 50% zinc. I am having trouble finding the equation to this problem.
Click here to see answer by xinxin(76)

Question 789246: A barrel contains 100 gallons of solution that initially has a concentration of 10 grams of salt/gallon. At the end of each minute, one gallon of solution is removed from the barrel, discarded, and replaced with one gallon of pure water, and well-mixed. How many minutes pass before the solution has a concentration of less than 1 gram of salt per gallon?
Click here to see answer by josgarithmetic(39618)

Question 789316: How much ater must be evaporated from 60 kilograms of 15% salt solution in order to obtain 40% solution?
Click here to see answer by josmiceli(19441)

Question 789282: how many gallons of a 12% salt solution should be added to 10 gallons of an 18% salt solution in order to produce a solution whose salt content is between 14% amd 16%
Click here to see answer by josmiceli(19441)

Question 789361: How many litres of pure antifreeze must be added to 6 litres of a 10% antifreeze solution to obtain a 20% anitfreeze solution.
6L=10% so does 12L=20% ???

Click here to see answer by stanbon(75887)

Question 789692: How many pounds of a chicken feed that sells for $5 a lb. must be mixed with 400 pounds of a feed
that sells for $8 a lb.to make a chicken feed that sells for $7.50 a lb.? 5x+8x/400=7.50
Click here to see answer by josgarithmetic(39618)

Question 789938: A chef is using a mixture of two brands of Italian dressing. The first brand contains vinegar, and the second brand contains vinegar. The chef wants to make milliliters of a dressing that is vinegar. How much of each brand should she use?
Click here to see answer by solver91311(24713)

Question 790009: Stuck need help with this problem:
A chemist needs a 110 mL of 32% solution, but only has 29% & 40% solutions available. How much of each solution does he need?
Can you please walk me thru this to help me get the answer?
Click here to see answer by josgarithmetic(39618)

Question 790032: how many ounces of a 20% alcohol solution must be mixed with 17 ounces of 25% alcohol solution to make 21%
Click here to see answer by josgarithmetic(39618)

Question 790435: How much heavier is a diamond with a mass of 1.03g than one that measures 976mg?

Click here to see answer by Astarilus Flora(3)

Question 790601: "Suppose that one cocktail is 25% ethanol and another cocktail is 110% ethanol. How many milliliters of each solution should be mixed to make 10.5 milliliters of an 80% ethanol solution"?
Can I get help with setting up an equation and solving please?
Thank you for your time.
Click here to see answer by rothauserc(4718)

Question 790667: Fred needs 45 ml of 8% sucrose solution to do his science experiment. He needs to mix a 5% sucrose solution with some 15% sucrose solution to get the 8% solution he wants. How much of each should Fred use? (Include units with your numerical answers.)
Click here to see answer by lwsshak3(11628)

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