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Question 754318: A goldsmith has two gold alloys. The first alloy is 20% gold; the second alloy is 60% gold. How many grams of each should be mixed to produce 40 grams of an alloy that is 30% gold?
Amount of 20% gold=_____g
Amount of 60% gold=_____g
Click here to see answer by anteater(7)

Question 754316: How much 40% acid solution should be mixed with 2 gallons of 60% acid solution in order to het a 50% acid solution?
Click here to see answer by josmiceli(19441)

Question 754396: Jacki wants to make a micture of nuts to sell in her store consisting of hazelnut and cashews hazelnuts cost 6.50 per pound and cashews cost 4.50 per pound if jackie wants 60 pounds total of mixture and the cost to be 5.10 per pound how many pounds of each will she need
Click here to see answer by josmiceli(19441)

Question 754522: Total quantity of a mixture of copper and zinc = 2.554g
Quantity of zinc = 2.490g
Find out % of copper in the mixture
Click here to see answer by stanbon(75887)

Question 754611: what is the resulting strength if you have 75 milliliters of a 4% solution and you dilute it by adding water to prepare 200 milliliters of solution.
Click here to see answer by josgarithmetic(39617)

Question 754721: What is the salt percentage (BWOW) of a mixture containing 3.5lbs of salt and 3 gallons of water.
Click here to see answer by josgarithmetic(39617)

Question 754775: An aluminum alloy containing 35% aluminum is to be made by combining 20% and 50% alloys. How many pounds of the 50% alloy must be added to 14 lbs. of the 20% alloy to produce the desired aluminum alloy?
Click here to see answer by stanbon(75887)

Question 754802: how much water should be evaporated from 200 L of 60% vinegar solution to increase the acidity to 90%
Click here to see answer by josmiceli(19441)

Question 755122: Please help me solve this question:
How many mm of a 5% HCl mixture and a 20% HCl mixture must be combined to get a 10 milimeters of a 12.5% HCl mixture?
Click here to see answer by stanbon(75887)

Question 755168: How many liters of a 75% acid solution must be added to 16 liters of a 15%acid solution to produce a 27%acid solution?
Click here to see answer by josgarithmetic(39617)

Question 755256: hi can you help with this:
you have two saltwater solutions. one consists of 20% salt,and the other consists of 15% salt.
if you want to add these two together to make 5 gallons of a 17% solution, how much of each solution should you add?
Click here to see answer by stanbon(75887)

Question 755314: If you have a 3% solution and add equil amounts of a 6% solution, what is the % solution?
THANK YOU!
Click here to see answer by tommyt3rd(5050)

Question 755314: If you have a 3% solution and add equil amounts of a 6% solution, what is the % solution?
THANK YOU!
Click here to see answer by Alan3354(69443)

Question 755335: I have a chemical that is a 40% concentrate, (40% active ingredient 60% water). I need to make one gallon of product that is 99.50% water and .50% of the active chemical.
Click here to see answer by ankor@dixie-net.com(22740)

Question 755391: A chemist wants to mix a 64% alcohol solution with 7 liters of 51% alcohol solution to produce a solution that is 62% alcohol. How many liters of the 64% alcohol solution should be used? Round to two decimal places.
Click here to see answer by lwsshak3(11628)

Question 755395: I need to find a system of equations and solve.
I'm not sure how i would set up the equation
x ml of a 60% salt solution are mixed with y ml of a 90% salt solution. The result is 35 ml of a 72% salt solution.
Click here to see answer by lwsshak3(11628)

Question 755336: how much water must be evaporated from 28 ounces of 2% salt solution to make a 7% salt solution
Click here to see answer by josgarithmetic(39617)

Question 755483: The owner wants to create 140 pounds of mixture of peanuts and cashews that he plans on selling for $11.35 per pound. The peanuts sell for $9 per pound and the cashews sell for $12 per pound. How many pounds of each must he mix together to break even.
Click here to see answer by josgarithmetic(39617)

Question 755503: a sugar solution was made by mixing 4 gal. of a 74% sugar solution and 10. gal of a 4% sugar solution. find the concentration of the new mixture.
Click here to see answer by josgarithmetic(39617)

Question 755653: Chang bought 7 pounds of sugar for $4. How many pounds of sugar did he get per dollar?
Click here to see answer by Cromlix(4381)

Question 755716: You have 100 Liters of 60% alcohol. How many liters of pure alcohol do you have to remove to have a solution of 50% alcohol? Please provide equation not just the answer :)
Click here to see answer by josgarithmetic(39617)

Question 755789:
The ratio of copper to zinc in a certain alloy is to . If grams of copper are used, how many grams of zinc are needed to make this alloy?
Click here to see answer by Alan3354(69443)

Question 755841: A hospital staff mixed a 75% disinfectant solution with a 25% disinfectant solution. How many liters of each were used to make 25L of a 35% disinfectant solution?
Click here to see answer by josmiceli(19441)

Question 755849: A coffee merchant combines coffee costing $6 per pound with coffee cost $3.50 per pound. How many pounds of each should be used to make 50lb of a blend costing $4.20 per pound?
Click here to see answer by josmiceli(19441)

Question 755847: How many quarts of water must be added to 13qt of a 80% antifreeze solution to make a 65% antifreeze solution?
Click here to see answer by josmiceli(19441)

Question 755866: If my car tank holds 17.2 gallons of gas and I drove 120 miles. How many gallons of gas did I drive and how do I find out the answer?
Click here to see answer by josmiceli(19441)

Question 755856: Find the cost per ounce of a sunscreen made from 100 oz of lotion that cost $3.42 per ounce and 70 oz of lotion that cost $14.64 per ounce?
Click here to see answer by josmiceli(19441)

Question 755877: how many gallons of 20% antifreeze should be mixed with 10 gallons of 10% antifreeze to obtain a 65% antifreeze mixed
Click here to see answer by Alan3354(69443)

Question 755852: A silversmith combined pure silver that cost $16.60 per ounce with 50 oz of a silver alloy that cost $15.20 per ounce. How many ounces of pure silver were used to make an alloy of silver costing $16.10 per ounce?
Click here to see answer by josgarithmetic(39617)

Question 755890: How many litters of a 70% acid solution must be added to 14 liters of a 20% acid solution to produce a 35% acid solution

Click here to see answer by josgarithmetic(39617)

Question 756084: A solution is made of water and pure acid. If 75% of the solution is water, how many litters of pure acid are in 20 litters of this solution?
Click here to see answer by tommyt3rd(5050)

Question 756130: A silversmith mixed 45g of a 80% silver alloy with 50g of a 15% silver alloy. What is the percent concentration of the resulting alloy?

Click here to see answer by Alan3354(69443)

Question 756144: I got an 85% one my first test, and another 85% on my second test, and a 45% on my third test, and a 75% on my fourth test, what does that average out to be?
Click here to see answer by Okeke_Christian(26)

Question 756380: The nurse has 2.68 liter(s) of a solution that is 81.8% alcohol. How many liters of pure alcohol must she add to bring the solution up to a 94.8% concentration?
How would I solve this?

Click here to see answer by josgarithmetic(39617)

Question 756649: Laurie invested some money at 12% and some more at 14%. She invested $50,000,000 more at 14% than shed did at 12%. Her total yearly interest from the two investments is $13,500,000. How much did she invest at each rate?
Click here to see answer by nerdybill(7384)

Question 756819: Jon ate 1/3 of jellybeans ron ate 1/4 10 were left how many were them
Click here to see answer by josmiceli(19441)

Question 756934: In cutting down from 5,000 to 1,578 friends in 7 hours, how many friends did crystal delete on average
Click here to see answer by Cromlix(4381)

Question 756988: If someone 50% of their cereal 20% of their fruit 15% of their milk and 15% of their juice how much did they eat total
Click here to see answer by dkppathak(439)

Question 757087: If you wish to increase the percentage of acid in 50 mL of a 15% acid solution to 25% acid, how much pure acid must you add?
Click here to see answer by josmiceli(19441)

Question 757130: A mixture containing 10% salt is to be mixed with 4 ounces of a mixture that is 20% salt, in order to obtain a 15% solution that is salt. How much of the first solution must be used?
Click here to see answer by josgarithmetic(39617)

Question 757368: How many pounds of coffee worth 5$ a pound should be added to 30 pounds of coffee worth 2$ a pound to get a mixture worth 3$ a pound?
Click here to see answer by josmiceli(19441)

Question 757367: . . . mixed coffee worth $9/lb with coffee costing $6/lb. How many lbs of each were used to make a lb blend that sold for $20
Click here to see answer by josgarithmetic(39617)

Question 757583: how much water must be added to 4 gallons of an 8% alcohol beer to reduce the alcohol content to 6%?

Click here to see answer by josgarithmetic(39617)

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