(3) The concentration of chloroform (CHCls) in air is 0.1 mol/m at 25 C and 1...
Chloroform (CHCI3) has a Drinking Water standard concentration of 0.10 mg/L What is this concentration expressed as parts per million (ppm)? Typical consumption Risk Analysis L/day for 70 years. How many grams of CHCI3 would the average human 1. a. b. assumes the average human drinks 2.2 during a lifetime at the Drinking Water standard concentration? consume Find the Volume of 1 mole of an ideal gas at 1.2 atm and 80°C 2. The Air Quality Standard for sulfur dioxide...
Suppose you find the concentration in your home is 57 ppm by volume at 1.00 atm pressure and 25 °C. What is the concentration in mg/L and in ppm by mass. (The average molar mass for dry air is 28.96 g/mol at 1.00 atm pressure and 25 °C.) what is Concentration = mg /L what is Concentration = ppm
1. Chloroform (CHCl3) has a Drinking Water standard concentration of 0.10 mg/L . a. What is this concentration expressed as parts per million (ppm)? b. Typical consumption Risk Analysis assumes the average human drinks 2.2 L/day for 70 years. How many grams of CHCl3 would the average human consume during a lifetime at the Drinking Water standard concentration? 2. The Air Quality Standard for sulfur dioxide (SO2) is 0.04 ppm. Express this as mg/m3 at 1 atm and 25oC.
help on questions 26-30 26. Which of the following concentration units will not change with temperature: molarity, percent mass, mole fraction, and molality. 27. Calculate the percent by mass of potassium nitrate in a solution made from 45.0 g KNO3 and 295 mL of water. The density of water is 0.997 g/mL. A) 1.51 % B) 7.57 % C) 13.3 % D) 15.2 % E) None of these 28. What is the molarity of a solution that is 5.50% by...
Caleulate the 0.45 ppm NO, concentration at 25°C and 1 atm pressure as mg/m' and ug/m 5. Estimate the stoichiometric air to fuel ratio for a 100% ethanol (CHCH2OH) fuel One mole of CH,CHOH-46g: one mole of O;-32g; one mole of N, 28g Assume the following reaction. 6 CH CH,OH+36 O; +135.36 N;12 CO + 18 H,O+135.35 N (Ans:18) Solid waste with the density of 110 kg/m is spread in a 0.5m layer at a landfill. If a steel wheel...
need #7-10 answered 6. The solubility of nitrogen gas at 25°C and a nitrogen pressure of 522 mmHg is 4.7 x 10 mol/L. What is the value of the Henry's Law constant in mol/L-atm? A) 6.8 × 10-4 mol/L-atm B) 4.7 x 10 mol/L-atm C) 3.2 × 104 moVL-atm D) 9.0 x 10 mol/L atm E) 1.5 x 10mol/L atm 7. According to Raoult's law, which statement is false? A) The vapor pressure of a solvent over a solution decreases...
Air at 32oC is humidified by flowing over a 1.2 m long container filled with water. The interfacial temperature is 20°C. The initial temperature of the air is 25% and its velocity is 0.1 5 m/s. 1. Calculate the average mass transfer coefficient for water in the air in m/s. 2. Calculate the molar concentration of water in the air at the water-air interface in mol H20/m3 Calculate the molar concentration of water in the air far from the interface...
In a closed system with 0.1 L water and 50 mg of solids, 3 x 10-5 moles of benzene are added. Hbenzene = 5.56 atm-L/mole MW of benzene = 78 g/mole R = 0.082 atm-L/mole-K T=25C Kd for benzene = 50 L-water/kg-solids a. What is the concentration of dissolved benzene? b. What is the concentration of benzene sorbed to the solids in moles/L?, moles/kg-solids? c. What fraction of the benzene is in the solid?
1. What is the difference in blood oxygen concentration between a person at sea level where the air pressure is 1.0 atm and the top of K2, where the total air pressure is 34.7 kPa? (You can assume the mole fraction of oxygen in air remains constant at 0.21 (or 21% of the total air pressure is oxygen), the temperature is 37 C, and that the solubility of oxygen in blood at 37 C is approximately 1.0 x 10-3 mol/L-atm.)
What is the equilibrium concentration of carbon dioxide in water that is in contact with air at 25 °C and 2.72 atm. The mole fraction of CO2 in air is 3.01×10-4. The Henry's law constant for carbon dioxide is 4.48×10-5 M/mmHg. A.2.79×10-5 M B.3.67×10-8 M C.9.26×10-2 M D.0.622 M E.6.72 M