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Multi-stage flash distillation is used to desalinate seawater so it is fit for human consumption. A flash distillation tank is composed of small chambers (called \"stages\"), each at a lower pressure than the previous stage. Salt water enters the first chamber, some fresh water flash evaporates, condenses, and is removed from the distillation tank. The remaining salt water moves to the next chamber, some fresh water flash evaporates, condenses, and is removed from the distillation tank. The remaining salt water moves to the next chamber, and the process repeats until very salty water is expelled as waste. Brine that is 35,000 ppm salt is desalinated through a 5-stage flash distillation process. The pressure in the stages is such that 8% by mass of the water entering the stage evaporates and leaves as fresh water. If the desalination plant wants to produce 1400.0 gallons of drinking water per day, how many gallons of brine must the plant take in per day? The density of fresh water is 1.000 g/cm3. The density of brine is 1.025 g/cm3.
What mass of waste brine is expelled in one day?
Given the following equilibrium constant at 25 C, calculate the equilibrium constant for the unknown reaction below.
In a typical experiment, you drop a gelatin capsule containing 0.1458 g of an Al-Zn alloy sample into an HCl solution. a) Write the equations that represent the chemical reactions that take place after the capsule has dissolved in HCl?
Which of the following solutions has the highest pH at 25?C?
A 2.983 gram sample containing an unknown amount of arsenic trichloride and the rest inerts was dissolved into a NaHCO3 and HCl aqueous solution. To this solution was added 1.910 grams of KI and 50.00 mL of a 0.00894 M KIO3 solution.
If a sample containing 3.00 mL of nitroglycerine (density = 1.592 g/mL) is detonated, how many total moles of gas are produced?
A 1L flask is filled with 0.25 mol N2and 0.65 mol H2 at 20 oC. These gases react to make NH3, heating up the flask to a temperature of 45 oC.
A cool solution of sodium nitrite and a solution of the amine in an ice bath. Moderately concentrated hydrochloric acid is added.
Consider the decomposition of calcium carbonate. Assume that ?H° = 177.8 kJ/mol and ?S° = 160.5 J/K·mol for the temperature range. CaCO3(s) -> CaO(s) + CO2(g)
What wavelength radiation (nm) must be used to eject electrons from chromium metal with a velocity of 1.50 x 10^6 m/s? The ionization energu of chromium metal is 7.00 x 10^-19 J
The protein in a 1.285-g sample of an oat cereal is determined by the Kjeldahl procedure for organic nitrogen. The sample is digested with H2SO4, the resulting solution made basic with NaOH
Im really confused about spectroscopy and need an introduction on what it is and what these types of problems mean.
a 125 g metal block at a temperature of 93.2 Celsius degree was immersed in 100. g of water at 18.3 celsius degree. given the specific heat of the metal (Cp = 0.900 J/g Celsius), find the final temperature of the block and the water.
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