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A sample of gas mixture from a neon sign contains 0.0856moles of Ne, and 0.0254 moles of kr . what are the mass percentages of Ne and Kr?
Rubidium-87 decays by beta decay with a half-life of 4.9 x 10^10 yr. How many 87Rb atoms are in a moon rock sample that has a rubidium decay rate of 3500 disintegrations per hour
Consider the following reaction in a closed reaction flask. If 1.50 atm of gas A is allowed to react with 0.500 atm of gas B and the reaction goes to completion at constant temperature and volume
2 Al (OH) 3 + 3 H2 SO4 = Al2 (SO4)3 + 6 H2O How many grams of Al2 (SO4)3 are generated when 152 g of H2SO4 reacts
Presume that the chlorine molecule can be treated as a harmonic oscillator with a force constant of k=329 Nm-1 and utilized the reduced mass for the mass of the oscillator. The mass of a35Cl atom is 34.9688 u and 36.9670 u for37Cl.
Calculate the absolute error and relative error for each measurement made by the glucose monitor
.375 kg of water are in a well insulated container at 21.3 degrees celsius. After 4.184 kJ of heat is added to the water, what is the final water temperature
An atom of 125Sn has a mass of 124.907785 amu. Calculate the mass defect (deficit) in amu/atom. Use the masses: mass of 1H atom = 1.007825 amu mass of a neutron = 1.008665 amu 1 amu = 931.5 MeV
Consider the following liquids with similar molar masses. Predict which has the strongest intermolecular attraction based only on vapor pressure data.
Calculate the cell potential for the following reaction that takes place in an electrochemical cell at 25°C.
A sample of gas occupies a volume of 364 mL at 1.28 atm and 27 oC. Calculate the volume of the gas if its temperature is changed to 57.0 oC while its pressure is held constant.
Draw all steps in a synthesis that would transform 2-propanol into A, 2, 4-dimethyl-3-pentanol. B, 1-chloro-3-methyl butane
We place the 2.00M HCl into the buret tube. Next we place 30.0 mL of the KOH unknown Molarity solution into a small flask and add some phenolphthalein indicator turning the solution an intense pink color. When we titrate exactly 32.0 mL of the 2.0..
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