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Calculate the de Broglie wavelength of an electron in the ground state of the H atom. Show that this wavelength is equal to the circumference of the "orbit"
calculate the number of kilograms of refrigerant that must be evaporated to freeze a tray of 17 one ounce ice cubes starting with water at 15C, Heat capacity of water is 4.184 j/gC deltaH of fussion of water = 333 j/g.
Identifying and balancing the different types of chemical reactions. Evaluate which processes represent chemical reactions.
a sled-dog racer builds three identical igloos. one is used to store her supplies another houses her team of 12 dogs
Find the number of moles of water that can be formed if you have 158 mol of hydrogen gas and 74 mol of oxygen gas. Express your answer with the appropriate units.
Which of the following is TRUE with regards to strong and weak acids? A. weak acids undergo complete dissociation in solution B. strong acids undergo partial dissociation in solution C.
55.0 mL of a 1.70 M solution is diluted to a volume of 288 mL. A 144 mL portion of that solution is diluted using 181 mL of water. What is the final concentration?
At a certqain temperature and pressure, one liter of CO2 gas weighs 1.65 g. What is the mass of one liter of N2 gas at the same temperature and pressure
The specific heat of lead is 0.0380cal/g degree celcius. If 47.0 calories of energy raised the temperature of a lead sample from 28.3 degrees celcius to 30.1 degrees celcius.
which one is oxidizing agent and which one is reducing agent?
Consider 1.5 kg of austenite containing 1.15 wt% C, cooled to below 727 degrees Celcius (1341 degrees Farenheit).
5.00 ml of a water sample was titrated for hardness with 4.15mL of 0.0200M EDTA. Write an equation for the reaction and calculate the hardness of the water in ppm
The equilbrium constant for the decompositon at 25 degrees C is 2.3 X 10 ^ -4. At 25 degrees C , 7.5 g of NH4CO2NH2 is sealed in a 10 L flask and allowed to decompose.
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