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ozone o3 acts as filter of harmful uv radiation in the stratosphere by absorbing light with a wavelength of 290 nm the
ch4 methane boils at -160c nh3 ammonia boils at -33c h2o boils at 100c h2s hydrogen sulfide boils at -60ca explain the
how many grams of magnesium metal must be burned to release 500 kcal of heat according to the following reaction 2 mg s
when 1 mole of liquid ethanol c2h5oh is burned it produces carbon dioxide gas liquid water and 1367 kj of heata write
at 25degc 1000 cal of heat is applied to each of 300 g of copper and 500 g of aluminum a which metal will absorb the
how much heat energy is needed to raise the temperature of a 050 l of ethanol d 079 gml from 200degc to 500degc
freezing point depression constant for camphor is 377 def cm if 225 mg of caffeine dissolved in 75g of camphor lowers
1 for which one of the following equations is hdegrxn equal to hfdeg for the productfor which one of the following
vapor pressure of water at 25 deg c is 24 mmhg and that of pure methanol is 120 mmhg what is the vapor pressure above
predict whether the reaction below is product-favored or reactant-favored by calculating delta gdegree from the entropy
given the following reaction calculate the enthalpy entropy and free energy changes for this reaction at 25 degrees c
the standard molar entropy for br2g is 24546jmolk at 25 degrees celsius given that delta s10458jk for the dissociation
pu-239 nuclear mass of 2390006 amu decays by alpha emission to u-235 nuclear mass of 2349934 calculate how much energy
consider formic acid hcooh ka 19 x 10-4 and its conjugate base hcoo- with a kb of 53 x 10-11write a net iconic equation
use the following diagram to write the sequence of orbitals from the lowest energy to the highest energy6s 6p5s 5p 5d
write the angular momentum quantum number l and magnetic quantum number ml of orbitals with principle quantum number n
according to the balmer-rydberg equation electromagnetic radiation with the shortest wavelength will be emitted when an
an example question is this copper and water have specific heats of 0385 and 4184 jgc respectively if 400 g of cu is
the addition of chlorine gas to magnesium bromide will it cause a reaction and if so what will the product
a graduate student was studying enzymatic reduction of cyclohexanones when the nadph enzyme was used to reduce the
explain why in cycloalkanes ring strain decreases with the increased number of carbons yet the most abundant rings in
an alpha particle mass 66 multiplied by 10-24 g emitted by radium travels at 32 multiplied by 107 plusmn 01 multiplied
enormous numbers of microwave photons are needed to warm macroscopic samples of matter a portion of soup containing 235
a ground state h-atom absorbs a photon of wavelength 6115 nm and its electron attains a higher energy level the atom
if 125 gallons of gasohol contains 150 gal of ethyl alcohol what is the percentage of alcohol in the