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Calculate the energy difference (E) for the transition from n = 1 to n = 4 energy levels of hydrogen per 1 mol of H atoms.
How many grams of Al are required to completely react with 50.0 g of O2?
which molecule will undergo only london dispersion forces when interacting with other molecules of the same kind?
How many moles of copper atoms were lost? ii. The Faraday constant. iii. The charge of one electron. iv. The mass of one electron.
A "Nature Valley Trail Mix " chewy granola bar contains 140 calories (Cal). If this energy were to be used to heat up 4.25 L of water at 25 degrees Celsius
If 97.3 L of NO2 forms, measured at 35 C and 632 mm Hg, what is the percent yield?
A solution of 5.00g of an organic compound in 25.00g carbon tetrachloride boils at 84.8 c at 760torr. What is the molecular weight of the compound. (bpt ccl4 = 76.5 C, Kb = 5.03 C/m)
if the height of the mercury column in a leveling bulb is 30 mm greater than that in the gas buret and atmospheric pressure is 670 mm, what is the pressure on the gas trapped in the buret.
Iodine-131 is a radioactive isotope. After 7.00 days, 54.7% of a sample of 131I remains.
If only 10ml of 3.0 M KOH were used in the alum preparation instead of the specified 25 ml,would KOH then become the limiting reactant? Write the chemical equation for the conversion of Al(s) to solid aluminum alum KAL(SO4)2*12H2O (S)
An unknown salt is either NaF, NaCl or NaOCl.When 0.050 mol of the salt is dissolved in water for form 0.500 L of solution, the pH of the solution is 8.08. What is the identity of the salt?
A 2.000 ton block of aluminum at room temperature (22 degrees celsius) is struck by lightning. The lightning transfers 8.000 x 10^6 kJ of energy to the block
A rock sample contains traces of 238U, 235U, 232Th, 208Pb, 207Pb, and 206Pb. Careful analysis shows that the ratio of the amount of 238U to 206Pb is 1.164
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