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Compute the frequency in hertz of the photon that is emitted when an electron falls from level n=10 to level n=5 in the H atom.
for ammonia, Kb is 1.8*10^-5, to make a buffered solution with pH of 10.0, the ratio of [NH4+] to [NH3] must be
if h2 of 50.0 ml and c2h4 of 50.0 ml are permitted to react at the pressure of 1.5 atm produce c2h6 that has a volume
Consider the reaction CaCN2 + 3 H2O → CaCO3 + 2 NH3 . How much CaCO3 is produced if 47.5 moles NH3 are produced
How does the strength of the attration between water molecules and sodium and chloride ions compare with the strength of the attraction between the sodium ions and chloride ions?
if a sample of 0.29 moles of Ar occupies 3.8L under certain conditions, what volume will 0.66 moles of Ar occupy under the same conditions.
a 37.4-l volume of methane gas is heated from 22 degrees c to 78 degrees c at constant pressure. what is the final
Aluminum has many different isotopes. What percentage of the mass of 26Al is attributable to its neutrons
complete the following reaction 207pbgamman and calculate the q value in mev. what is the maximum threshold wavelength
Which of the following ions have noble gas configurations- Fe2+, Fe3+, Sc3+, Co3+. Rank the following from most polar to least polar: N2, HF, HCN, H2O
Compute the mean potential energy as well as the mean kinetic energy of an electron in the ground state of a hydrogenic atom.
When would you do a hot filtration. Why do you wash your crystals after you collect them by filtration
Ammonia gas is produced by reacting hydrogen gas with nitrogen gas. To produce 450 g of ammonia gas using air as your source of nitrogen gas, what volume of air is required if the air is introduced at 25°C and 740 mmHg
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