a pharmacist wishes to mix a solution that is 4% minoxidil. she has on hand 70 ml of a 3% solution and wishes to add some 6% solution to obtain the desired 4% solution. how much 6% solution should she add?

Q: What amount of a 80% acid solution must be mixed with a 20% solution to produce 400 mL of a 50%…

A: Topic - percentage and equation in one variable

Q: You need a 70% alcohol solution. On hand, you have a 195 mL of a 20% alcohol mixture. You also have…

A:

Q: Mildred, a pharmacist, was required to prepare 10 L of a 40% alcohol solution by mixing the flowing.…

A:

Q: How many quarts of pure alcohol should be added to 10 quarts of 10% alcohol solution to obtain a…

A: Solving the problem by finding the value of pure alcohol.

Q: You have a 4% solution and the doctor asks you to give 5ml of that solution, how many mgs did you…

A: You have a 4% solution and the doctor asks you to give 5ml of that solution, how many mgs did you…

Q: how many quarts of pure antifreeze must be added to 8 quarts of a 10% in time for your solution to…

A:

Q: A chemist needs 130ml of a 72% solution but has only 17% and 82% solutions available. Find how many…

A: Let x ml of 17% solution and y ml of  82% solution is mixed to get 130 ml of a 72% solution which…

Q: In a class experiment, a student needs 5 Liters of 6% solution. He found a 4% and a 10% solution in…

A: Let a=Volume in liters of 4% solutionand b=Volume in liters of 10% solution.Therefore, a+b=5⇒b=5-a

Q: How many quarts of pure antifreeze must be added to 3 quarts of a 10% antifreeze solution to obtain…

A: Calculation:let x be the  required  amount of  pure antifreeze solution.Write a decimal equivalent…

Q: A solution of ethyl alcohol that is 75% alcohol by weight is to be used as a bactericide. The…

A: Consider the provided information, Let x is grams of water and y is grams of 95% ethyl alcohol. So,…

Q: You need a 45% alcohol solution. On hand, you have a 495 mL of a 40% alcohol mixture. How much pure…

A: Let's find.

Q: You need a 65% alcohol solution. On hand, you have a 55 mL of a 35% alcohol mixture. You also have…

A: First we assume that x be the amount of the 70% mixture.Then using the data given in the problem…

Q: You need a 30% alcohol solution. On hand, you have a 315 mL of a 15% alcohol mixture. You also have…

A: Here we have to take the concentration equation and solved then to get the answer so I'm providing…

Q: You need 760 mL of a 40% alcohol solution. On hand, you have a 95% alcohol mixture. How much of the…

A: Let the amount of 95% alcohol mixture to be added= x ml Let the amount of pure water to be added= y…

Q: You need 1050 mL of a 30% alcohol solution. On hand, you have a 25% alcohol mixture. How much of the…

A:

Q: Thirty gallons of a 20% acid solution is needed for an experiment. Only 40% and 10% acid solutions…

A: Given: 30 gallons of a 20% acid solution.

Q: You need a 20% alcohol solution. On hand, you have a 140 mL of a 5% alcohol mixture. You also have…

A:

Q: How many quarts of pure antifreeze must be added to 3 quarts of a 40% antifreeze solution to obtain…

A: ⁸

Q: How many gallons of a 80% antifreeze solution must be mixed with 80 gallons of 20% antifreeze to get…

A: Given: There are two types of solution One contain 80% antifreeze and other contain 20% antifreeze…

Q: A chemist needs 12L of a 40% alcohol solution. She must mix a 12% solution and a 50% solution. How…

A:

Q: A chef is going to use a mixture of two brands of Italian dressing. The first brand contains 8%…

A: Suppose that, x mL of 8% vinegar is used in the mixture and 380 - x mL if 30% vinegar is used in the…

Q: You'need a 55% alcohol solution. On hand, you have a 120 mL of a 50% alcohol mixture. You also have…

A: Needed amount of alcohol solution =55%

Q: How much pure acid should be mixed with 6 gallons of a 50% acid solution in order to get an 80% acid…

A:

Q: What quantity of a 75% acid solution must be mixed with a 25% solution to produce 600 mL of a 40%…

A: 75% of acid to be mixed with 25% of solution to make 600ml of 40% solution.

Q: DA bulk store has two types of mixed nuts: One is 60% peanuts, and the other is 35% peanuts. One…

A:

Q: A biologist has two brine solutions, one containing 10% salt and another containing 70% salt. How…

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Q: You need a 50% alcohol solution. On hand, you have a 420 mL of a 5% alcohol mixture. You also have…

A: Consider,  You will need x mL of the 85% solution. Then, we have to find the value of x.

Q: How much water must be evaporated from 12 ounces of a 2% salt solution to make a 3% salt​…

A: Percentage of salt in 12 ounces of salt solution is 2%. Thus calculate the amount of water in the 2%…

Q: You need a 40% alcohol solution. On hand, you have a 240 mL of a 35% alcohol mixture. You also have…

A:

Q: How much antifreeze should be added to 5 quarts of a 30% mixture ofantifreeze to make a solution…

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Q: One antifreeze solution is 35% alcohol and another is 15% alcohol. How much mixture should be added…

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Q: What amount of a  60% acid solution must be mixed with a 30% solution to produce  300 mL of a 50%…

A: To determine the amount of the 60% of the acid solution.

Q: How much alcohol must be added to 24 gallons of a 14% solution of alcohol in order to produce a 20%…

A: Let x gallon alcohol has to be added.  So total amount of the mixture is = (x+24) gallons   24…

Q: You need a 75% alcohol solution. On hand, you have a 135 mL of a 10% alcohol mixture. You also have…

A:

Q: You need a 50% alcohol solution. On hand, you have a 500 mL of a 95% alcohol mixture. How much pure…

A:

Q: A chemist has 70 mL of a 50% methane solution. How much of a 80% solution must she add so the final…

A: Assume x ml of 80% solution is added.

Q: What quantity of 70 percent acid solution must be mixed with a 30 percent solution to produce 600 mL…

A:

Q: You need 360 mL of a 40% alcohol solution. On hand, you have a 15% alcohol mixture and a 55% alcohol…

A: Given: Two separate solution contains 15% alcohol mixture and 55% alcohol mixture. The objective is…

Q: A barista needs to mix a 20% coffee solution with concentrated coffee (100%) to produce 9 liters of…

A: Let x be the amount in liters of mixture of concentration 20% and y be the amount in liters of…

Q: How much water must be evaporated from 240 mL of a 10% salt solution to produce a 25% salt solution?

A:

Q: Travis needs to create a 15oz bottle of solution that is 17% alcohol for his guests at the martini…

A: Given that Travis has a 15% alcohol solution and a 20% alcohol solution. It is required to find the…

Q: You need a 20% alcohol solution. On hand, you have a 225 mL of a 15% alcohol mixture. You also have…

A: Given data is : 225 ml of 15% alcohol mixture. 45% alcohol mixture Let y ml of 45%  mixture alcohol…

Q: What amount of a 60% acid solution must be mixed with a 35% solution to produce 300 mL of a 55%…

A:

Q: You need a 70% alcohol solution. On hand, you have a 200 mL of a 65% alcohol mixture. You also have…

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Q: Mary has half as many pebbles as Peter. James has three times as many pebbles as Mary and Jude has a…

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Q: A laboratory has a solution that contains 9 ounces of benzalkonium chloride. If this is 15% of the…

A: Given that, a solution contains 9 ounces of benzalkonium chloride.Find the total solution, if given…

Q: A nurse mixes 60 cc of a 50% saline solution with a 30% saline solution to produce a 42% saline…

A:

Q: What quantity of a 70% acid solution must be mixed with a 40% solution to produce 150 mL of a 60%…

A: Given.

Q: A pharmacist wishes to mix a solution that is 7% Minoxidil. She has on hand a 100ml of a 2% solution…

A: step 2 complete solution

Q: You need a 25% alcohol solution. On hand, you have a 300 mL of a 40% alcohol mixture. How much pure…

A: