01 May 1. A laser produces a beam of light with a wave length of 543 nm. If the power output is 25
1. A laser produces a beam of light with a wave length of 543 nm. If the power output is 25 mW. How many photons can be emitted by this device?
2. A person drinks four glasses of cold water 3C every day. The volume of each glass is 2.345*10^2 ml. How much heat in KJ does the body to supply to rise the temperature of the water to 37C? How much heat would your body lose if you were to ingest 7.55*10^2 g of snow at 0C to quench thirst? Use the heat to melt snow is 6.01 KJ/mole.
3. What is the mass of carbon dioxide produced from the reaction between octane and oxygen, use the conditions for oxygen (pressure 1028.45 mmHg, volume 989.6 ml, and temperature 56.77C).
4. A sample of chloroform gas occupies in 9.86 liters at 144 F. Calculate the resulted temperature at which the gas will occupy 1650 ml, if the pressure remains unchanged.
5. A sample of natural gas contains 19.88 g of methane, 4.53 g ethan, and 2.1161 g of propane. If the total pressure of the gas es is 1009.45 mmHg, what are the partial pressure in atmosphere for every gas?
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