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Problem- During an electrolysis experiment, the copper wire at the anode decreased in mass from 2.145g to 2.018g. A current of 120 mA was used for 20.0 minutes and then 150 mA for 18 minutes. Using this data, what mass should be assigned for the molar mass of copper assuming 100% efficiency?
The molar mass that I find is half of the actual answer. Help me to find correct answer please
Determine the functional form of Phi(t) and the frequency of a pendulum bob whose mass is m and is attached to a massess rod of length l. Assume that the bob oscillates in the limit of small oscillations.
When 10.0 g of NH3 reacts, the actual yield of N2 is 8.50 g. What is the percent yield?
Five hundred liters of a gas are cooled from 20°C to 10°C while the pressure remains constant.what the new volume will be?
Polonium metal crystallizes in a lattice which contains only one Po atom per cubic unit cell. The radius of polonium atom is 1.67 A. Calculate the density of the polonium metal
If the titrant has a molarity of 0.2000 M and there are 50.00 mL of analyte present, what is the molarity of the analyte?
A 9.41g sample of HgCl2 is dissolved in 32.75g ethanol (C2H6O). The boiling point is elevated to 80.58 C. Is mercury (II) chloride an electrolyte in ethanol
Determine the number of moles of oxygen that react completely with 8.0 moles of C2H6 based on the following balanced equation.
An emission line from K atoms is found to have two closely spaced components, one at 766.70 nm and the other at 770.11 nm. Account for this observation, and deduce what information you can.
50.0 mL of 2.00 M H2SO4 react with 75.0 mL of 2.00M NaOH. Identify the limiting and excess reactants. How many grams of Na2SO4 will be formed.
FeCl3 and Mg3(PO4) to give FeSO4 and MgCl2 I need to know what are the : Molecular Equation? Ionic Eq? Net Ionic Eq? What is the name of this type of reaction. Which ions are spectator ions
A gas container with a fixed volume has a pressure of p atm. Gas is then added to the container so that the number of gas particles is the container doubles. What happens inside the container
A 0.879g sample of a CaCl2.2H2O/K2C2O4.H2O solid salt mixture is dissolved in 150ml of deionized water, previously adjusted to a pH that is basic. The precipitate, after having been filtered and air-dried, has a mass of 0.284g. The limiting reactant ..
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