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1. A flask contains 0.761 mol N2, 0.179 mol O2, 0.0310 mol He and 0.0260 mol H2 at total pressure of 749 mm Hg. What is the partial pressure of O2?
2. Ethanol burns in the air as described by the following equation, C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(l). What volume of CO2(g) would be produced if 227 g of ethanol (46.07 g/mol) was burned completely at 35°C and 1.1 atm?
3. Ozone molecules in the stratosphere absorb much of the harmful UV radiation from the sun. Typically, the temperature and pressure of ozone in the stratosphere are -23 °C and 1.0 torr, respectively. How many moles of ozone are present in 100. L of air at this height?
4. If a steel container was filled with 5.0 atm of nitrogen gas at 21°C, what would the pressure be if the container was stored in a hot warehouse with a temperature of 38°C ?
What is the theoretical yield of aluminum oxide if 2.40 of aluminum metal is exposed to 2.10 of oxygen?
Think back to what you learned in this course about solutions and intermolecular forces. Why don't these to "mix" together (in other words, make a homogenous solution) when combined. Why do they separate into layers
a solution containing ethylene glycol and water has a vapor pressure of 7.88 torr at 10oc. pure water has avapor
A solid substance has a density of 8.7g/cm^3. How many pounds will this substance weigh if you have a block of the substance with a volume of 215.0 cubic feet
Write a reaction for the formation of a peptide bond between alanine and serine. React the amino group of alanine with carboxyl group of serine. Remember that there are 2 products in this reaction.
how many metric tons t of oxygen are combined in a sample of pitchblende that contains 2.5 t of uranium? analysis
What mass of sucrose C 12 H 22 O 11 must be mixed with 543 grams of H 2 O to make a solution with an osmotic pressure =8.00 atm at the temperature of 12 degree celsius?
Predict the normal boiling point of pure B (in degrees Celcius) given that deltaHvaporization(Pure B)=67.9kJ/mol.
Problem- Top fuel dragsters and funny cars burn nitromethane as fuel according to the following balanced combustion equation- 2CH3NO2(l)+3/2O2(g)?2CO2(g)+3H2O(l)+N2(g)
Draw resonance structures for 9-(hydroxymethyl)anthracene. Is it possible for all three rings to simultaneously have bensenoid
If the weight limit for a roof is 55 lbs/ft^2, how many inches of snow can be on the roof before it must be removed? Again assume that 10 inches of snow is equivalent to 1 inch of liquid water if melted. Liquid water is 62.4 pounds/cu-foot (lbs/ft..
what would happen to the molar mass of the solute if the thermometer used actually read 1.4 degrees Celsius too high?
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