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What is the stoichiometric ratio between the number of moles of copper (II) oxide produced in the reaction and malachite? The molar mass of malachite is 221.1 g/mol and the molar mass of copper (II) oxide is 79.55 g/mol. To calculate the mass of malachite, use the data you recorded using the balance.
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.
Iodine-131 has a half-life of 8 days. If you started with a 12.0-mg sample of I-131, how much would remain after 24 days? Plutonium-239 is a byproduct of the fission reaction used to produce energy in nuclear power reactors. It has a half-life of 24,..
A spherical water tank of radius R=4m is emptied through a small circular hole of radius r=.02m at the bottom. The top of the tank is open to the atmosphere. The instaneous water level h in the tank can be determined from the solution of the follo..
devise a general method for determining the fractional abundances of two or more isotopes from a mass spectrum. your method must include some means of measuring the signals
Write a balanced equation for the conversion of C6H5CHOHCH3 to methyl ketone in the presence of I2 and NaOH. Identify which is being oxidized and which is being reduced.
Determine the limiting reactant and also calculate how much of the gas is produced?
What will happen to the retention time if the temperature of the column is increased. Calculate the following peak areas from your GC chromatogram.
Heat flows into an ideal gas at a constant volume. The pressure increases from 1.5 atm to 5.5 atm. Next the gas is compressed at constant pressure from 5.0 L to 2.5 L and goes back to its original temperature.
it is given that the density of mercuryhg 13.5 gml density of h2o 1.00 gml. determine the barometric pressure of
Calculate the mass of silver nitrate (in grams) in a 145 mL solution of 5.38 M AgNO3.
What type of forces allow oil to mix with another nonpolar liquid?
Calculate the pH at the points in the titration of 40.00 mL of 0.425 M NH3 for the reaction below. NH3(aq) + HNO3 ? NH4+(aq) + NO3?(aq) For NH3, Kb = 1.8x10-5.
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