There is an average concentration of ethane of 2.51 ppb in the atmosphere. If the air temperature is 21.7°C and atmospheric pressure is 0.987 atm, express this concentration in units of a) ppm b) atm c) molecules/cm3 d) μg/m3 e) Determine the total mass of ethane in the atmosphere in grams with an appropriate prefix
There is an average concentration of ethane of 2.51 ppb in the atmosphere. If the air...
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...
In Downtown the average concentration of atmospheric nitrogen dioxide (NO2) during March is 10 ppb; what is the concentration in µg/m3 (assume standard temperature and pressure: 25°C, 1 atm)?
PLEASE ANSWER ALL 1) The pressure of the atmosphere decreases with increasing altitude in the Choose all that apply. mesosphere The pressure never decreases with increasing altitude. thermosphere stratosphere troposphere 2) If you were travelling outward from the earth in a space shuttle at an altitude of 79.6 km you would be in the ______. 3a) The gas, nitrogen, is found in dry air at sea level at a concentration of 78.1 percent by volume. What is the concentration of...
The average concentration of Carbon Monoxide in a city's air in 2006 was 4.5 ppm. The average atmospheric pressure of the city is 754 Torr. (a) Calculate the partial pressure of CO. (b) Calculate the number of CO molecules in 1.0L of this air at a temperature of 25°C
Based on the “National Ambient Air Quality Objectives”, the acceptable hourly average concentration of carbon monoxide (CO) is 35 mg/m3 . Find the acceptable concentration of CO in ppm if the temperature is -30oC and pressure is 0.92 atm. Express the concentration as a percent by volume.
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...
A and B Part A At the surface of Mars the atmosphere has average pressure 6.0 x 10' Pa and average temperature -63°C. What is the mean free path of atmospheric molecules (assumed to be spheres of radius 2.0 x 10m ) at the surface of Mars? Express your answer with the appropriate units. x = 468 K Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B How many times greater is your answer in...
The atmosphere contains about 5.2×10^15t of air. What mass in metric tons of carbon dioxide is in the atmosphere if the concentration of CO2 is 390 ppm ? Express answer with the appropriate units.
The estimated average concentration of NO2 in the air in theUS in 2006 was 0.016 ppm. (a) Calculate the partial pressure of the NO2 in a sample of this air when the atmospheric pressure is 755 torr (99.1kPa). (b) How many molecules of NO2 are present under these conditions at 20 C in a room that measures 15 x 14 x 8 ft? Please go in detail with question B. I'm not sure how to incorporate room measurements, Thanks!
At the surface of Venus the average temperature is a balmy 460 ∘C due to the greenhouse effect (global warming!), the pressure is 92 Earth-atmospheres, and the acceleration due to gravity is 0.894 gEarth. The atmosphere is nearly all CO2 (molar mass 44.0g/mol) and the temperature remains remarkably constant. We shall assume that the temperature does not change at all with altitude. Part A What is the atmospheric pressure 2.00 km above the surface of Venus? Express your answer in...