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A 12.0 gas cylinder has been filled with 5.40 moles of gas. You measure the pressure to be 5.00 atm. What is the temperature inside the tank? Express your answer numerically in degrees Celsius.
A gaseous mixture of O2 and Kr has a density of 1.192 g/L at 305 torr and 300. K. What is the mole percent O2 in the mixture
What is the freezing point of a solution prepared by dissolving 11.3 g of Ca(NO3)2 in 115 g of water?
If 8.40 kJ of heat is needed to raise the temperature of a sample of metal from 15 degrees celsius to 20 degrees celsius, how many kilojoules of heat will be required to raise the temperature of the same sample of metal from 25 degrees celsius to ..
If the oven uses microwave radiation of wavelength 12.2 cm, how many photons of this radiation are required to heat 1.28 g of water 1.00°C, assuming that all the photons are absorbed?
substance a and b are the same mass and at the same initial temperature. When the same amount of heat is added to each the final temperature of a is 75 degrees celsius
When 33.4 mg of a compound is dissolved in 10.0 ml of water at 25 C the solution has an osmotic pressure of 558 torr. Calculate the molar mass of the compound.
suppose 321 grams of methylamine (CH3NH2) and 332L of oxygen gas are mixed together in the reaction below at STP. how many grams of water should be prouduced?
Determine its molecular formula if the molar mass of the compound = 199.55 grams per mole?
Explain clearly the properties of agood freezing agent basing the explanation vant hoffs factor and on colligative property.
The density of citronellal, a mosquito repellant, is 1.45 g · L-1 at 365C and 50.0 kPa. What is the molar mass of citronellal?
What proportions of ethanol and water should be mixed in order to produce 100 cm3 of a mixture containing 50 percent by mass of ethanol.
As of 2007 world record for swimming 1500.0 m in a long course pool is 14 min 34.56 s. if we follow this rate then calculate how many seconds would be taken by a man to swim 0.850 miles?
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