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Explain the distance between layers in a crystal is 342 pm. X rays are diffracted from these layers at an angle of 32.4°. Presuming that n = 4, compute the wavelength of the X rays in nm.
42 grams of a mystery powder was heated from 36.0 degrees celcius to 65.0 degrees celcius. the powder absorbed 5895 j of energy. what is the specific heat of the powder?
a solution was prepared by dissolving 28.0g of kcl in 225g of water. calculate the mass percent of kcl in the
Balance the following electrochemical equation for an acidic environment. HCl + Al3+ -----> ClO41- + Al
What is the molar mass of a compound that diffuses 2.75 times more slowly than argon at the same temperature and pressure?
A gas has a volume of 10 L at 0 degrees C. What is the final temperature of the gas in C if its volume increases to 27 L? Assume that amount of the gas and its pressure remain unchanged.
At a certain temperature, reaction has equilibrium constant (Kc) of 1.9 x10^19. Determine the equlibrium constant for the reaction based on this information at the same temperature.
How many moles of oxygen are required for the complete combustion of 4.0 moles of decane to give CO2 and H2O
Calculate the deltaG in kJ for this reaction at 37 oC to the nearest tenth of kJ. Only include the numerical part of your answer, do not include units
a stainless steel spoon weighs 25.2 g and is at a temperature of 18.5 oc. it is immersed in 81.7 ml of hot coffee t
If 225ml of oxygen gas at STP were needed for an experiment, how many moles of H2O2 would be needed
a solution of 62.4 g of insulin in enough water to make 1.000 l of solution has an osmotic pressure of 0.305 atm at
The atmospheric pressure in the room when the measurement was made was 628 mmHg and the temperature was 36.0 degrees C. What is the density of the gas?
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