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calculate the wavelength of light emitted from a hydrogen atom when it undergoes a transition from the n11 level to n5
a typical frequency used by gsm cell phones is 6110 mhz what is the wavelength of this
the distance from the earth to the nearest stars is measured in light-years convert the distance 54 light-years to si
1 a tunable dye laser emits pulses of light at 5660 nm each having a total energy of 7e-6 j calculate the number of
a specific brand of gourmet chocolate candy contains 700 g of dietary fat in each 227-g piece how many kilograms of
a sprinter set a high school record in track and field running 2000 m in 214 s what is the average speed of the
acetominophen is a weaker acid than carbonic acid but asprin is a stronger acid than carbonic acid prepare the flow
the wavefunction inside a long barrier of height v is f ne-kx calculate a the probability that the particle is inside
a block of metal has a width of 32cm a length of 171cm and height of 33cm its mass is 15kg calculate the density of the
calculate a the mean potential energy and b the mean kinetic energy of an electron in the ground state of a hydrogenic
what is the property number order of a carbon with an ethyl a methyl an oh and a cooh is it clockwise and is it an s or
a homeowner uses 400 x 103 m3 of natural gas in a year to heat a home assume that natural gas is all methane ch4 and
what are the h3o and the ph of an ammonia buffer that consists of 037 m ammonia and 024 m ammonium chloride kb of
a 330-g sample of an enzyme is used to make a 400-ml solution what is the molar mass of the enzyme if the osmotic
the first order decomposition of n2o5 at 328 k has a rate constant of 170 times 1083 s81 if the initial concentration
gold has a face-centered cubic arrangement with a unit cell edge length of 408 how many moles of gold fit in a sheet
the total mass of carbon in living systems is estimated to be 75 x 1017 g the total mass of carbon on earth is
the sulfuric acid acts as a catalyst to remove one molecule of water from 2 molecules of ethanol what is the balanced
what are the h3o and the ph of a propanoate buffer that consists of 047 m ch3ch2coona and 012 m ch3ch2cooh ka of
draw the structures of the ketones with the molecular formula c6h12o that have a four-carbon
what is the buffer-component concentration ratio no2- hno2 of a buffer that has a ph of 290 ka of hno2 71 x
the thermite reaction combines aluminum powder and iron oxide and ignites the mixture to make aluminum oxide and iron
dentists might use a mixture of 40 n2o and 60 o2 as an initial anesthetic of nitrous oxidealthough exact proprtions may
a 1 how many ml of boiling water are required to dissolve 2800g of phthalic acid 2 if the solution were cooled to 14
a 125g piece of metal is heated to 288c and dropped into 850g of water at 260c if the final temperature of the water