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A line in the emission spectrum of an atom occurs at a wavelength of 560 nm. What is the energy difference between the two energy levels involved in this emission.
Find out how many total moles of gas are produced If a sample has 2.10 mL of nitroglycerine (density = 1.592 g/mL) is detonated?
What is the density of lead if a rectangular bar measuring 0.500 in height, 1.55 in width, and 25.00 in length has a mass of 220.9g.
Write a balanced chemical equation for this reaction when Ferrophosphorus reacts with pyrite making iron (ll) sulfide and a compound that is
Calculate the molar concentration of uncomplexed Zn2+ in a solution that contains 0.20 mole of Zn(NH3)42+ per liter and 0.0116 M NH3 at equilibrium.
A chemist dissolves 0.9 g of an unknown monoprotic (one acidic H) acid in water. She finds that 14.6 mL of 0.426 M NaOH are required to neutralize the acid.
Compute the number of mol of S represented by 1.810 x 10 -27 atoms of S, also determine the number of atoms of sulfur in 5.22 x 10 -7 kilograms of sulfur.
What is the concentration of g salt per 100 g water of a saturated solution in which 3.82 g of salt are dissolved in 9.54 g of water?
Determine the pressure, in torr and atm, of 3.94 mol carbon monoxide gas in a 4.25 Litre tank at temperature 31 degrees Celsius.
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.
Calculate the molar solubility of bismuth sulfide, Bi2S3 (Ksp = 1.6 x 10-72) in (a) pure water, and (b) 0.05 M cadmium sulfide, CdS
A gas sample was collected over water at 25.3 degrees Celsius, The total pressure is determined to be 0.97 atm. What is the partial pressure of the gas that was collected?
How many atoms of neon occupy a volume of 14.3 L at STP.
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