Assume the average house dimensions are 3 m x 5 m x 2.5 m (V = 37.5 m). After several days of measurements in homes around the community, you have gathered the background PM2.5 concentration of Ca = 5 μg/m³; average indoor PM2.5 concentration during cooking C = 700 µg/m³; peak indoor PM2.5 concentration Cmax = 2000 µg/m³; and emission rate from the fire 440 µg/min or 7.33 μg/s. You also determine that after the stove burns out the time it takes for the indoor air to go from peak concentration back to ambient background is 100 min (At). The PM2.5 decay rate is 1.33 x 10 s¹ ww To design better ventilation you want to calculate the current average ventilation rate for the structure using the data you collected. [(ACH 2.25 1/hr) mmm =

Define anthropogenic CO2 in details? And List down the 3 main sources of anthropogenic CO2 emissions

0 O file:///C:/Users/MEGA/Downloads/Cengel.%20Heat%20and%20mass%20Transfer%20F FIGURE P10-20 10-21 Water is boiled at sea level in a coffeemaker equipped with a 30-cm-long, 0.4-cm-diameter immersion-type electric heating element made of mechanically polished stainless steel. The coffeemaker initially contains 1 L of water at 14°C. Once boiling starts, it is observed that half of the water in the cof- feemaker evaporates in 32 min. Determine the power rating of the electric heating element immersed in water and the surface temperature of the heating element. Also determine how long it will take for this heater to raise the temperature of 1 L of cold water from 14°C to the boiling temperature. I atm St Coffee maker FIGURE P10-21 IL b ar th in 10 Со 0.5 atu she the occ han belo stair belo

9:37:09 24.0 YA :49|39% expert.chegg.com/exper = Chegg Time remaining: 01:50:25 Chemistry What is the free energy change associated with the passage of a pair of electrons from NADH to Oz if the passage of one proton from the matrix to the intermembrane space costs +20.1 kJ mol-1 as shown in Sample Calculation 15.3? Use 3 significant figures. AG= kJ mol-1 SAMPLE CALCULATION 15,3 Problem Calculate the free energy change for translocating a proton out of the mitochondrial matrix, where pHmatriy = 7.8, pHtrol = 7.15, Ay = 170 mV, and T= 25°C. Solution Since pH = -log (H (Equation 2.4), the logarithmic term of Equation 15.7 can be rewritten. Equation 15.7 then becomes AG = 2.303 RT(pH - pH) + ZFAy Substituting known values gives AG = 2.303(8.3145 J K-- mol-)(298 K)(7.8 - 7.15) +(1)(96,485 J- v-. mol(0.170 V) = 3700 J- mol- + 16,400 J- mol- = +20.1 kJ mol Your answer Typed answers are easier for students to read than handwritten notes Submit Skip

A pipe of length I connects to tanks with a mixture of the same gas. In these tanks a trace amount of a second gas is maintained at fixed concentrations n and nº. The gas in the pipe and tanks has a diffusivity D. What is the concentration n* of the second gas in the tube at a distance x = 0.8L away from the tank with concentration n*? Select one: a. O b. n* = n² +0.8(n² — n†) O c. n* = 0.5(n² + n²₂) n* = n† +0.8(n† — n²) O d. n* = n₁ +0.8D(n − n)

Please I have an exam tomorrow and I want this question

B. Air is flowing through a duct under a draft of 4.0 cm H2O. The barometer indicates that the atmospheric pressure is 730 mm Hg. What is the absolute pressure of the air in inches of mercury? See Figure E5.5 Scanned with C mScanner Middle Technical University Engineering Technical College - Baghdad Fuel and Energy Techniques Engineering Department أرم.د. عاصم حسن محمد 1" Stage Subject: Principles of Chemical Engineering Time: 2 hours Examiner: /2021 First Semester (2020-2021 Air 40 cm Hy0 Figure ES.5

Using RCRA procedures, determine if the following are classified as hazardous wastes. State the reason why or why not is is hazardous. If it is a hazardous waste, state the RCRA waste category number. Assume that the industry porducing the waste is a RCRA hazardous waste generator. 1. Sawdust in a warehouse contaminated by a spill of pentachlorobenzene. 2. Sludge from the treatment of water from the chemical conversion coating of aluminum. 3. An aqueous industrial waste stream from a plastic manufacturing plant that is discharged to a river.

How do I find the specific heat of the metal?

ASsume that you are in a room of 35 m3 volume where 50 smokers are lighting up cigarettes at an average of 2 cigarettes per hour. Calculate the air ventilation rate required to prevent the formaldehyde concentration from exceeding 0.03 ppm. Assume 5 microgram of formaldehyde per cigarette.