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Explain why do we need potassium carbonate before distillation? I did an ethanol from sucrose lab as well as the TA had to put potassium carbonate in the mixture before we utilized fractional distillation to separate the 3 liquids
The normal boiling point for acetone is 56.5°C. At an elevation of 5300 ft the atmospheric pressure is 630. torr.
The ratio of the number of atoms of the isotopes 69Ga and 71Ga in eight samples from different sources was measured in an effort to understand differences in reported values of the atomic mass of gallium
Use standard reduction potentials (shown below) to calculate the potential of a nickel-cadmium cell that uses a basic electrolyte that has a 0.6 M hydroxide concentration.
A piece of metal weighing 5.10 g at a temperature of 48.6 C was placed in a calorimeter containing 20.00 mL of water at 22.1C, and the final equilibrium temperature was found to be 29.2 C. What is the specific heat of the metal
a 25.0-ml sample of 1.00 m nh3 is titrated with 0.15 m hcl. what is the ph of the solution after 15.00 ml of acid have
Starting with 3.00 moles of HBr in a 12.0 L reaction vessel, calculate the concentrations of H2, Br2, and HBr at equilibrium.
Calculate the equilibrium constant for the chemical system described by the following chemical equation: 4 Al (s) + 6 Ni2+ (aq) 4 Al3+(aq) + 6 Ni(s) The 2+ and 3+ indicate charge. How do you calculate the Keq
Draw the Lewis structure of [(CH3)3O]+ . Be sure to show all atoms, bonds, lone pairs, and formal charges.
what is the change in internal energy when a gas contracts from 377 ml to 119 ml under a pressure of 1550 torr while at
Draw the structure of an alkane or cycloalkane that has more than three but fewer than ten carbon atoms, and only primary hydrogens.
The flask was then shaken until the solution was uniform. A 60.0 mL sample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100. mL of the final solution?
Calculate the force of attraction (in N) between a cation with a valence of +2 and an anion with a valence of -2
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