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when solid sodium hydroxide is added to water, the temp increases... is it endo or exothermic?
A 11.0-L helium tank is pressurized to 26.0 atm. When connected to this tank, a balloon will inflate because the pressure inside the tank is greater than the atmospheric pressure pushing on the outside of the balloon.
the alcohol attacking the 2-phenylacetic acid with the subsequent loss of a proton. b. protonation of the ethanol by H2SO4. c. protonation of the carbonyl oxygen of the 2-phenylacetic acid. d. protonation of the hydroxyl group of the 2-phenylac..
Write down the expression for the radial distribution function of a 3p electron in a hydrogenic atom and determine the radius ar which the electron is most likely to be found
what is the order of increasing stability: Li2,Li2+,Li2-?
What volume of ether would be required to extract 0.95 g of aspirin from a solution of 1.0 g of aspirin in 100 mL of water in a single extraction
Copper is elctroplated from CuSO4 solution. A constant current of 4.00 amp is applied by an external power supply. How long will it take to deposit 1.00x10^2 g of Cu? The atomic mass of copper is 63.546.
a compound contains 14.5 g of magnesium and 3.5 g of oxygen. what is the mass percent of oxygen in the
An unknown element, X, reacts with chlorine to form a compound with the formula XCl2. Which element is most likely to be element X?
lutonium-239 is a byproduct of the fission reaction used to produce energy in nuclear power reactors. It has a half-life of 24,400 years. A student determines that it will take 97,600 years for the radioactivity of a Pu-239 sample to drop to one-e..
Suppose that the microwave radiation has a wavelength of 12.4cm . How many photons are required to heat 275mL of coffee from 25.0 ?C to 62.0 ?C?
An unknown metal M reacts with S to form a compound with a formula M2S3.If 3.12g of m reacts with exactly 2.88g of sulphur, what are the names of metal M and compound M2S3
an empty volumetric flask weighing 60.42 grams weighed 309.60 grams when filled with water. after emptying the water
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