A cubic meter of air sample was sampled at 1.0 atm and 25 C and was found to contain 8.8 micrograms of NO2. How many ppb of NO2 is in that air?
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A cubic meter of air sample was sampled at 1.0 atm and 25 C and was...
A cubic meter of air sample was sampled at 1.0 atm and 25 C and was found to contain 2.9 micrograms of NO2. How many ppb of NO2 is in that air?
A cubic meter of air sample was sampled at 1.0 atm and 25 C and was found to contain 11.0 micrograms of SO2. How many ppb of SO2 is in that air?
There are 2.46 x 10^25 molecules in a cubic meter at 1 atm and 25C. If we found 3.38 x 10^18 molecules of CO in that sample, what is the concentration in ppm?
Air at 50% relative humidity is cooled isobarically at 1 atm absolute from 90⁰C to 25⁰C. a) Estimate the dew point and degrees of superheat of the air at 90⁰C. b) How much water condenses (mol) per cubic meter of feed gas? c) Suppose a sample of the 90⁰C air is put in a closed variable-volume chamber containing a mirror and the pressure is raised at constant temperature until a mist forms on the mirror. At what pressure (atm) would...
Suppose the average concentration of NO2 is measured to be 85 micrograms/m^3 at 25 degree Celsius and 1 atm. MW of N02 is 46 grams. 1. Express that in standard ppmv at 1 atm of pressure and 25 degree Celsius. 2. Does this exceed the air quality standard of 53 ppbv at 25 degree Celsius and 1 atm? 3. At the elevation of Denver, the pressure is about .82 atm. Express the NO2 standard of 53 ppb in micrograms/m^3 at...
Unit conversion. (10 pts) Convert a concentration of 5.62 ´1013 molecules/cm 3 to the ppb scale. Assume 25° C and 1.0 atm total air pressure. Convert a concentration of 6.0 ´1014 molecules/cm 3 to the moles per liter (molarity) scale. Assume 27.5° C and 0.99 atm total air pressure. Convert a concentration of 36.5 ppb of ozone, O3, into the number of molecules/cm3. Assume the air mass temperature is 25.3° C and its total pressure is 1.05 atm. Convert a...
Question 29 6 pts A sample of air at a pressure of 1.25 atm is found to contain carbon dioxide and nitrogen gas. If the pressure of the nitrogen gas is 1.20 psi, what is the pressure of the carbon dioxide? 0.05 atm 1.22 atm 1.17 atm 0.08 atm
Problem 6.14 Humidity and Condensation Air at 30.0% relative humidity is cooled isobarically at 1 atm absolute from 90.0°C to 35.0°C. a. Estimate the dew point and the degrees of superheat of the air at 90.0°C. Dew point: Degrees of superheat: doc b. How much water condenses (mol) per cubic meter of feed gas? (See Example 6.3-2) mol c. Suppose a sample of the 90.0°C air is put in a closed variable-volume chamber containing a mirror and the pressure is...
Problem 2 (30%)-500 cubic meter per minute (CMM) air at 20 C, 75% RH, mixes with 200 CMM air at 5 C and 30% RH. The mixture is then heated to 20 C. a - Show the processes on the Psychrometric chart and determine the final relative humidity b - Calculate the heating had (k.J/min) provided by the heating coils. Problem 2 (30%)-500 cubic meter per minute (CMM) air at 20 C, 75% RH, mixes with 200 CMM air at...
A perfect gas sample contains 6.2*^22 molecules per cubic meter at 205 k. calculate the pressure of this gas and express the answer in units of pascals, bar, atm, and mmHg.