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That portion of the atmosphere known as the ozone layer can be found at a height of about 30 km above the earth's surface in the middle latitudes. In this portion of the stratosphere, the temperature is -40 deg C and the pressure is 10 mbar. Assume that the air in the ozone layer is about 78% nitrogen, 20.8% oxygen, and .2% ozone; calculate the density of air in this part of the atmosphere. Give answer in milligrams/cubic centimeter.
50.0 ml of 2.00M H2SO4 react with 75.O ml of 2.00M NaOH.Identify the limiting and excess reactants.
The reaction 2NO (g)-> N2 (g) + O2 (g) has a H = 180.5 kJ. How much heat will be required to produce 44.8 L of NO by the reverse reaction?
Explain using Le Chatelier's principle the results obtained when 6.0 M NaOH was introduced into the iron (III) thiocyanate equilibrium.
The density of silver is 10.5g/cm3 what is the volume im cm 3 of an ingot of silver with mass 0.743 kg. If this sample of silver is a cube how long in each edge in cm
Determine how many grams of each of the following solutes would be needed to make 3.00 x 10^2of a 0.100 M solution.
Calculate the freezing point of a 0.08500 m aqueous solution of NaNO3. The molal freezing point depression constant of water 1.86 degrees C/m.
Carbon dioxide makes up approximately 0.04% of Earth's atmosphere. If you collect a 2.8 sample from the atmosphere at sea level (1.00 ) on a warm day (28), how many molecules are in your sample
Rather than weigh the sample on a balance a chemist wants to dispense the liquid using a pipette. What volume (in mL) should she measure out?
compatible combination was titrated with 0.1021M standardHCl. It took 20.97mL to reach the phenolphthalein end point and 42.00mL to reach the bromocresol greenend point.
What is the final volume of the balloon? Assume ideal-gas behavior. A very flexible balloon with a volume of 1.2 L at 1.0 atm at 300 K is allowed to rise to the stratosphere
Determine the oxidation number for the indicated element in each of the following substances.
what percentage of the original ag remains in solution when 180 ml 2.10times10-2 m agno3 is added to 240 ml
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