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Using equation E=(-2.18*10^-18)(1/n^2), calculate the energy of an electron in the hydrogen atom when n=2.
Determine which elements are being oxidized and which elements are being reduced in each reaction
Calculate the energy of attraction (in eV) between a cation with a valence of +2 and an anion with a valence of -3,
sample containing 4.80 g O2 of gas has a volume of 15.0 L. Pressure and temperature remain constant. What is the new voume if 0.500 mole O2 gas is added?
If a contemporary wooden chair were somehow preserved to for the next 3,900 years, what C-14 dacay rate should be expected from the wood used to make the chair? (t1/2 = 5730)
Propose a structure for a compound A that has an infrared absorption at 1820 cm-1 and a single proton NMR absorption at ? 1.5. Compound A reacts with water to give dimethylmalonic acid and with methanol to give the monomethyl ester of the same aci..
grignard reagent made from magnesium and 1-chloro-2-methylpropane with lables charges on the C-Mg bond
express the work of isothermal reversible expansion of a van der waals in reduced variable and find a definition of reduced work that makes the overall expression independent of the identity of the gas.
A gas is initially at 1.2 atm, 15.0 L, and O°C. What is the final pressure when the same amount of gas is heated to 10°C and the volume changed to 13.0 L
Calculate the percent by weight, mole fraction and mole percent of each component in a mixture consisting 9g of water (H2O), 120g acetic acid(CH3COOH) and 115g of ethyl alcohol (C2H5OH).
what mass of naphthalene must be dissolved in 24000 grams of benzene to give a solution with a freezing point 3.00 celsius below that of pure benzene?
A buffer that contains 0.255 M of acid, HA and 0.153 M of its conjugate base A-, has a pH of 3.39. What is the pH after 0.0115 mol of NaOH are added to 0.666 L of the solution
Ethanol is a common laboratory solvent and has a density of 0.789 g/mL
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