chemist

Q: There are some apples and oranges in a fruit basket. If Eve eats 2 apples, the number of apples left…

A: Let x be the number of apples and y be the number of orange inthe fruit basket.

Q: John wants to make 100 ml of a 5% alcohol solution by mixing a 2% alcohol solution with a 7% alcohol…

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Q: 3. Art has a 10% solution of alcohol and a 40% solution of alcohol. How much of each does he need to…

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Q: A doctor prescribes 4 oz of 7.5% hydrocortisone to a patient. Hydrocortisone is available in 10% and…

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Q: Peter has some candies. He places 2/3 of his candies equally into 12 small boxes, and the rest…

A: Let Peter have x candies in total.

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: Danny has 2/3 as many toy cars as Jack. They have a total of 75 toy cars. How many toy cars does…

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Q: You have one type of candy that sells for $2.20/lb and another type of candy that sells for…

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Q: An allergy pill contains 180 mg of medicine. 10% of the medicine is eliminated from the patient's…

A: Using disintegration formula.

Q: Anthony Altino is mixing foor for his yound daughter and would like meal to supply 1 gram of protein…

A: The desired nutrition is 1 gram of protein and 7 milligrams of iron. One ounce of cereal contains…

Q: you are serving 160 guests a 1/2 cup portion of cubed watermelon. each watermelon weighs 20 pounds…

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Q: How many gallons of a 57% salt solution do we need to mix with 120 gallons of a 30% salt solution so…

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Q: The health care provider ordered a dose of 450 mg. The medication solution available is 1 gram in 5…

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Q: There are three taps. Tap A fills 4 containers in 2/5 hours. Tap B fills eight containers in 1/2…

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Q: A crime-scene investigator has 3.4 ounces of a sample. He needs to conduct four tests that each…

A: Definition used -          Remaining sample = Total sample - used sample