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Antifreeze is a compound added to water to reduce the freezing point of a mixture. In extreme cold (less than
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- A tank contains 200 liters of brine with 20 kg of salt in solution. Brine containing 0.25 kg per liter of salt flows into the tank at the rate of 3 liters per minute, and the mixture, kept uniform by stirring, flows out at the rate of 2 liters/minute. Determine the time when the concentration of salt becomes 0.15 kg/liter. CHOICES: 48.94 minutes 28.94 minutes 38.94 minutes 18.94 minutesarrow_forwardA tank contains 200 gallons of fresh water. Brine containing 2 lbs/gal of salt enters the tank at 4 gpm and the mixture, kept uniform by stirring, runs out of at 3 gpm. Find the amount of salt in the tank after 30 minutes.arrow_forwardA health clinic uses a solution of bleach to sterilize petri dishes in which cultures are grown. The sterilization tank contains 60 gal of a solution of 4% ordinary household bleach mixed with pure distilled water. New research indicates that the concentration of bleach should be 6% for complete sterilization. How much of the solution should be drained and replaced with bleach to increase the bleach content to the recommended level? gal?arrow_forward
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- The radiator in a car is filled with a solution of 55% antifreeze and 45% 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 3.3 L, how much coolant should be drained and replaced with water to reduce the antifreeze concentration to the recommended level?arrow_forwardA water tank that initially contains 140 L of solution in which 20 g of salt was dissolved. A solution with a salt concentration of 4 g/L is added at a rate of 6 L/min. The solution is mixed well and was drained from the tank at a rate of 4 L/min. Find the answer for the following question. 1) Find the concentration of the solution in the tank after 30 minutes.arrow_forwardA tank contains 200 liters of fresh water. Brine containing 2.5 N/L of dissolved salt runs into the tank at the rate of 8 L/min and the mixture kept uniform by stirring runs out at 4 liters/min. What is the amount of salt when the tank contains 320 liters of brine? 487.5 N 287.5 N 387.5 N 416.7 Narrow_forward
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