Question

stion A scientist mixes water (containing no salt) with a solution that contains 45% salt. She...

stion

A scientist mixes water (containing no salt) with a solution that contains

45%

salt. She wants to obtain

180

ounces of a mixture that is

30%

salt. How many ounces of water and how many ounces of the

45%

salt solution should she use?

Homework Answers

Answer #1

I hope this helped.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A chemical company mixes pure water with their premium antifreeze solution to create an inexpensive antifreeze...
A chemical company mixes pure water with their premium antifreeze solution to create an inexpensive antifreeze mixture. The premium antifreeze solution contains 70% pure antifreeze. The company wants to obtain 140 gallons of a mixture that contains 65% pure antifreeze. How many gallons of water and how many gallons of the premium antifreeze solution must be mixed?
A salt solution containing 2 grams of salt per liter of water is poured into the...
A salt solution containing 2 grams of salt per liter of water is poured into the tank at a rate 3 liter/min where initially contains 30 liters of pure water. The mixture then was drained at the same rate as its poured into the tank. Solve, Hint: (??(?) = ???????? ????????????? (??) × ???? ???? (??)? − ????(???? ????????????? (???) × i. the initial-value problem that describes the amount of salt in the tank for t > 0 ?? ????...
1.) An automobile mechanic mixes ethylene glycol with water to make a solution of automobile antifreeze....
1.) An automobile mechanic mixes ethylene glycol with water to make a solution of automobile antifreeze. This mixture contains 1104g of ethylene glycol and 1.50 kg of pure water. What is the freezing point of this solution in degrees Celsius? (Assume 1 atm pressure). 2.) A zoologist combines NaCl with pure water for use in an outdoor aquatic facility. She makes the salt/water mixture by dissolving 15.0 kg of NaCl and 400.0 kg of pure water. What is the freezing...
A tank initially contains 100 gal of a salt-water solution containing 0.05 lb of salt for...
A tank initially contains 100 gal of a salt-water solution containing 0.05 lb of salt for each gallon of water. At time zero, pure water is poured into the tank at a rate of 2 gal per minute. Simultaneously, a drain is opened at the bottom of the tank that allows the salt-water solution to leave the tank at a rate of 3 gal per minute. What will be the salt content in the tank when precisely 50 gal of...
A tank contains 40 lb of salt dissolved in 400 gallons of water. A brine solution...
A tank contains 40 lb of salt dissolved in 400 gallons of water. A brine solution is pumped into the tank at a rate of 4 gal/min; it mixes with the solution there, and then the mixture is pumped out at a rate of 4 gal/min. Determine A(t), the amount of salt in the tank at time t, if the concentration of salt in the inflow is variable and given by cin(t) = 2 + sin(t/4) lb/gal.
A tank contains 70 lb of salt dissolved in 200 gallons of water. A brine solution...
A tank contains 70 lb of salt dissolved in 200 gallons of water. A brine solution is pumped into the tank at a rate of 2 gal/min; it mixes with the solution there, and then the mixture is pumped out at a rate of 2 gal/min. Determine A(t), the amount of salt in the tank at time t, if the concentration of salt in the inflow is variable and given by cin(t) = 2 + sin(t/4) lb/gal.
A 200-gallon tank is currently half full of water that contains 30 pounds of salt. A...
A 200-gallon tank is currently half full of water that contains 30 pounds of salt. A solution containing 3 pounds of salt per gallon enters the tank at a rate of 5 gallons per minute, and the well-stirred mixture is withdrawn from the tank at a rate of 5 gallons per minute. How many pounds of salt are in the tank 10 minutes later?
A tank contains 360 gallons of water and 50 oz of salt. Water containing a salt...
A tank contains 360 gallons of water and 50 oz of salt. Water containing a salt concentration of 1/6 (1 + 1/4 sin t) oz/gal flows into the tank at a rate of 8 gal/min, and the mixture in the tank flows out at the same rate. The long-term behavior of the solution is an oscillation about a certain constant level. a) What is this level? b) What is the amplitude of the oscillation? (Round your answers to two decimal...
A tank contains 144 gal of water and 48 oz of salt. Water containing a salt...
A tank contains 144 gal of water and 48 oz of salt. Water containing a salt concentration of   (1/6+1/12sin  t) oz/gal flows into the tank at a rate of 3 gal/min, and the mixture in the tank flows out at the same rate. (a) Find the amount of salt in the tank at any time. The amount of salt in the tank is Q(t)=
A chemist has three different acid solutions. The first acid solution contains `15%` acid, the second...
A chemist has three different acid solutions. The first acid solution contains `15%` acid, the second contains `30%` and the third contains `50%`. He wants to use all three solutions to obtain a mixture of `78` liters containing `35%` acid, using 3 times as much of the `50%` solution as the `30%` solution. How many liters of each solution should be used? The chemist should use __________________ liters of `15%` solution, __________________ liters of `30%` solution, and __________________ liters of...