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Why are the hydrides of alkali metals are high-melting solids, whereas the hydrides of halogens are gases at room temperature?
the international unit for weighing diamonds carat 1 carat 200 mg exactly. determine the volume of a 0.76 carat
when hydrogen sulfide gas is bubbled into a solution of sodium hydroxide the reaction forms sodium sulfide and water.
calculate the mass of MgCO3 precipitated by mixing 10.0 mL of a 0.200 M Na2CO3 solution with 5.0 mL of a 0.0450 M Mg(NO3)2
What is the standard potential, E cell, for this galvanic cell? Express your answer to four significant figures and include the appropriate units.
10 ml of a silver nitrate solution is titrated to the equivalence point with 8.5 ml of a .1100 M HCL solution. What is the concentration of the silver nitrate?
Determine What is the difference in energy between the ground and excited state if the absorption spectrum of rhodopsin is centered at roughly 500. nm.? what is the probability of rhodopsin populating the first excited state At a physiological tem..
How many constitutionally isomeric monochlorides can be formed on free radical chlorination of 2,3,3-trimethylpentane
which of the responses includes all of the following that can form hydrogen bonds with water molecules
What mass of Sucrose(C12H22O11) should be combined with 456g of water to make a solution with an osmotic pressure of 8.05atm at 280K
Use the rydberg equation to calculate the wavelength in nm of the photon when an electron in a hydrogen atom undergoes a transition from n=6 to n=2
What are the equilibrium concentrations of NH2OH (hydroxylamine), NH3OH+, and OH- in a 0.15 M solution of hydroxylamine (Kb=6.6*10^-9)? What is the pH of the solution
find the expected freezing point of a water solution that contains 268 g of aluminum nitrate alno33 in 8.50 kg of
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