Questions on Word Problems: Mixtures answered by real tutors!

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Question 338646: What quantity x of a 75% acid solution must be mixed with a 25% solution to produce 500 mL of a 40% solution?

Click here to see answer by Alan3354(69443)

Question 338635: what quantity x of a 65% acid solution must be mixed with a 20% solution to produce 300 ml of a 45% solution?
Click here to see answer by Alan3354(69443)

Question 338660: how many ounces of a 25% alcohol solution must be mixed with 10 ounces of a 30% alcohol solution to make a 25% alcohol solution?
Click here to see answer by Alan3354(69443)

Question 338740: there is 10 liters of water and 10% of it is acid. how much more liters of water do you need to add for it to become 4% acid?

Click here to see answer by stanbon(75887)

Question 338751: A container has 6 liters of a 40% alcohol solution in it. How much pure alcohol should be added to raise it to a 60% solution?
Click here to see answer by mananth(16946)

Question 338916: At Twilight Coffee Shop, Manager Bella buys only half and half (12%)milk and skim (0%fat) milk to simplify inventory.
She is rushing out of town and need to quickly leave instructions for her employees on how to obtain 2% fat milk for customers.
A) For one set of instructions, she would like to end with 1 gallon of 2% fat milk. How much half and half and skim milk must she mix together to obtain 1 gallon of 2% fat milk?
Click here to see answer by jrfrunner(365)

Question 339123: mary has a total of 30 dimes and nickels in her pocket worth $2.35. How many of each coin does she have?

i first had n represent the number of nickles and d number of dimes so i did n+d=30 but now im not to sure of what to do next?
Click here to see answer by Alan3354(69443)

Question 339718: You have 15 liters of a mixture that is 30% alcohol. How many liters of pure alcohol are contained in the mixture?
Click here to see answer by stanbon(75887)

Question 339805: a sterilization tank contains 120 gallons of a solution of 6% bleach mixed with pure distilled water. for complete sterilization, the solution only needs to be at 4%. how much of the solution needs to be drained and replaced with water to reduce the concentration of bleach.
note:: u want to still have 120 gallons of solution when you are finished diluting.
Click here to see answer by stanbon(75887)

Question 339125: How many ounces of a 25% acid solution should be mixed with a 50% acid solution to produce 100 ounces of a 40% acid solution?
Click here to see answer by Fombitz(32388)

Question 339842: I have 3 problems that I am stuck on. Here is the first question.
Many fruit drinks are actually only 5% real fruit juice. If you let 2 oz. of water evaporate from 12 oz. of a drink that is 5% fruit juice, what is the percent concentration of the result?
Is there a formula for evaporation?
.12
____ - x = 2(.02 x .05)
.05
Is this how you get started. Thanks for your help
Click here to see answer by solver91311(24713)

Question 339855: A bank loaned out $14,000, part of it at the rate of 9% per year and the rest at 19% per year. If the interest recieved in one year totaled $2,000, how much was loaned at 9%?
Click here to see answer by rfer(16322)

Question 339854: How much water should be added to 1 gallon of pure antifreeze to obtain a solution that is 65% antifreeze?
Click here to see answer by Fombitz(32388)

Question 339279: what quantity of x of 65% acid solution must be mixed with a 20% solution to produce 300ml of 45%
Click here to see answer by Fombitz(32388)

Question 339946: What quantity x of a 80 % acid solution must be mixed with a 15 % solution to produce 600 mL of a 40 % solution?
Click here to see answer by nyc_function(2741)

Question 339946: What quantity x of a 80 % acid solution must be mixed with a 15 % solution to produce 600 mL of a 40 % solution?
Click here to see answer by checkley77(12844)

Question 340238: What quantity x of a 65% acid solution must be mixed with a 20% solution to produce 300mL of a 45% solution?
Click here to see answer by edjones(8007)

Question 340268: 2/3 of a pound of candy at $1.20 per pound

Click here to see answer by rfer(16322)

Question 340322: A chemist of needs a 50% solution sulfuric acid having a volume of 72 liters. how much pure acid is in the 72 liters of 50% solution?
Click here to see answer by stanbon(75887)

Question 340310: Two vessels contain mixtures of alcohol and water. In one there is three times as much as alcohol as water; in other, five times as much as water as alcohol. How much much be drawn off from each to fill a third vessel which holds 7 gallons, in order that its contents may be half alcohol and half water.
Click here to see answer by stanbon(75887)

Question 340234: How many gallons of 80% antifreeze solution must be mixed with 90 gallons of 25% antifreeze to get a mixture that is 70% antifreeze?
Click here to see answer by Fombitz(32388)

Question 340434: How much 5% alcohol must be mixed with 10% alcohol to get 2000 ml of 6% alcohol?>
Click here to see answer by Fombitz(32388)

Question 340409: how many cubic centimeters of 30% solution should be mixed with 80% solution to get 50 cubic centimeter of 60% solution?
Click here to see answer by Fombitz(32388)

Question 340459: How much 2% acid must be mixed with 10% acid to get 500 ml of 5% acid?
Click here to see answer by Fombitz(32388)

Question 340448: How many quarts of water need to be added to 80 quarts of 80% alcohol to obtain a 70% alcohol solution
Click here to see answer by Fombitz(32388)

Question 340783: How many liters of a 2% salt solution must be added to 30 liters of a 10% salt solution to dilute it to an 8% solution?
Click here to see answer by mananth(16946)

Question 340917: how much water should be added to 1 gallon of pure antifreeze to obtain a solution that is 65% antifreeze?
Click here to see answer by nerdybill(7384)

Question 341135: How much of a 60%-acid solution must be mixed with 70 gallons of a 16%-acid solution to obtain a
solution that is 50% acid?
Click here to see answer by stanbon(75887)

Question 341315: Tim and Judy mix two kinds of feed for pedigreed dogs. They wish to make 27 pounds of feed worth $0.26 per pound by mixing one kind worth $0.17 per pound with another worth $0.36 per pound. How many pounds of the cheaper kind should they use in the mix?
Click here to see answer by mananth(16946)

Question 341447: how many liters of 25% alcohol must be mixed with 40 liters of a 35% alcohol solution to obtain a 32% alcohol solution?
Click here to see answer by Fombitz(32388)

Question 341445: how many liters of 25% alcohol must be mixed with 40 liters of a 35 % alcohol solution?
Click here to see answer by Fombitz(32388)

Question 341538: A coffee shop owner mixes two types of coffees to make a specialty blend. Alone, the coffees sell for $7.50 and $10.00 per pound. How many pounds of each type of coffee should be used to make 15 pounds of a mixture that sells for $8.95 per pound? Copy and complete the table below. (i am trying my best to copy the table...what is the difference between the cost per pound and the cost in dollars?)
AMOUNT, COST PER POUND, COST DOLLARS are on the top (labels)
COFFEE 1, COFFEE 2, MIXTURE are on the side (labels)

Click here to see answer by stanbon(75887)

Question 341604: A two-acre building lot is five times as long as it is wide. What are its dimensions?
Click here to see answer by mananth(16946)

Question 341603: The radiator in a car is filled with a solution of 70% antifreeze and 30% water. The manufacturer of the antifreeze suggests that for summer driving, optimal cooling of the engine is obtained with only 50% antifreeze. If the capacity of the radiator is 3.5 L, how much coolant should be drained and replaced with water to reduce the antifreeze concentration to the recommended level?
Click here to see answer by mananth(16946)

Question 341738: You are a lab technician and need to put together 13 ounces of a 10.64% salt solution. You have stock solution in quart bottles of 6% salt solution and 16% salt solution. Your job is to calculate the number of ounces, accurate to the nearest hunderdth, of each stock solution that is needed to make the required amount.
Click here to see answer by checkley77(12844)

Question 341600: A health clinic uses a solution of bleach to sterilize petri dishes in which cultures are grown. The sterilization tank contains 80 gal of a solution of 4% ordinary household bleach mixed with pure distilled water. New research indicates that the concentration of bleach should be 7% for complete sterilization. How much of the solution should be drained and replaced with bleach to increase the bleach content to the recommended level?
Click here to see answer by ankor@dixie-net.com(22740)

Question 341817: Juan mixes 25 mL of a 15% acid solution with 60 mL of a 25% acid solution and 48 mL of a 50% acid solution. About what percent acid is the final solution?
If you could please help me figure this out with using only one variable (perferrably x) that would be great...thanks!!!
Click here to see answer by mananth(16946)

Question 341819: A large tank contains 100 gallons of pure water. How many gallons of a saline solution containing 25% salt must be added to obtain a solution that has 10% salt ?
Click here to see answer by mananth(16946)

Question 342247: How many quarts of water must be added to 9 qt of an 80% antifreeze solution to make a 45% antifreeze solution?
Click here to see answer by mananth(16946)

Question 342173: How many cups of a grapefruit must be added to 40 cups of punch that contains 5% grapefruit juice to obtain a punch that is 10% grapefruit?
Click here to see answer by Alan3354(69443)

Question 342331: One more question i hope someone can help me with! Here it is: Soybean meal is 18% protein, cornmeal is 9 % protein. How many pounds of each should be mixed together in order to get 360 lb mixture that is 11 % protein?
I hope someone can help me...i am hating these word problems!
Click here to see answer by Fombitz(32388)

Question 342400: How many gallons of a 3% salt solution must be mixed with 20 gallons of a 9% solution to obtain a 5% solution?
Click here to see answer by Fombitz(32388)

Question 341982: √7x^5√14x
Click here to see answer by Fombitz(32388)

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