Purchase Solution

Calculating the average number of air molecules at a specific altitude and atmospheric temperature.

Not what you're looking for?

Ask Custom Question

At an altitude of 55.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude?

Hint: Solve the equation for the pressure as a function of height and temperature and from this use the ideal gas equation to calculate the volume of air.

Purchase this Solution
Solution Summary

This solution uses the equation P=Poe ^ (-Mgx/kT) to find pressure. It then uses this pressure to determine the number of moles of "air molecules" in one cubic cm.

Solution Preview

Start with this equation P=Poe ^ (-Mgx/kT)

P is the pressure at height x
Po is the pressure at sea level
x is the altitude in cm
M is the average molecular mass
g = 980 cm/sec^2 = the ...

Purchase this Solution
Free BrainMass Quizzes
General Chemistry - Classification of Matter

This test will assess your knowledge on the classification of matter which includes elements, compounds and mixtures.

Organic Chemistry Naming: Alkanes

This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.

Functional groups in Organic Chemistry

You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.

Periodic table

Match Elements with their Symbols

Elements are provided: choose the matching one- or two-letter symbol for each element.

View More Free Quizzes
Related BrainMass Solutions

  • Average number of air molecules per cubic centimeter of air

    23217 At an altitude of 45.00 km, the average atmospheric temperature is essentially 0 degrees C. What is the average number of air molecules per cubic centimeter of air at this altitude?

  • Environmental Chemistry - Average number of air molecules

    232825 Average number of air molecules per cubic centimeter of air at a given altitude ... At an altitude of 40.00 km, the average atmospheric temperature is essentially 0 degrees C.

  • Psychrometry-Hot House

    Air Conditioning applications occur in the region where the value of the specific volume can be viewed as an average of 0,83 m3/kg and where the specific humidity is 0,0073 kg/kgda. ...these values are at 17 °C dry bulb temperature and 60 % relative

  • Fractions and Ratios : Parts Per Billion

    /hbase/kinetic/idegas.html From the ideal gas law, PV=NkT, we know that for the same temperature and pressure, the volume taken by a certain number of molecules is the same for any molecules, regardless of their molecular weight.

  • Bow Shock Wave Parameters

    The freestream temperature and the static pressure at this altitude are 200.15K and 2.5 Pa, respectively. use the normal shock relations to calculate the values of the following parameters downstream of the normal shock wave: a. static pressure b. static

  • Working with sound waves

    As the humidity increases, the velocity of sound in air increases, even though r (Gamma, ratio of specific heats) for the mixture of air and water vapour is less than for dry air. hence the pitch somewaht increases with humidity.

  • Density, Pressure and Temperature

    Spy balloon is to be constructed of a material with a mass of 0.5kg. it will be filled with helium and must be able to carry and instrument payload of 50kg at an altitude of 1000m where the density of the air is 1.16 kg/m^3. what mass of helium will be

  • Altimeter and Boiling Point Temperature

    Because when we increase our altitude we generally find an accompanying decrease in atmospheric pressure, changing altitude can change a boiling point.

  • Chemical Bonding and States of Matter

    The rest are below: Q2) Atmospheric pressure at any given point has to do with the 'weight' of the air above that point.

View More Related Solutions