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Calculate the minimum concentration of mg 2+ that must be added to .10 M NaF in order to initiate a precipitate of magnesium flouride. ( Ksp for MgF2= 6.9 x 10-9)
A sample of a liquid from an unlabeled bottle was subjected for analysis: MS showed that M+ has an m/z of 89 and IR displayed bands at 2995-2840 cm-1, and 1562, and 1425. Identify the functional group in the molecule and provide 2 possible structu..
The air tanks used by a certain fire department each contain 25.0 l of air at a pressure of 200.0atm and a temperature of 293 k. Assume the average fire fighter exhales 0.500l of air per breath at a temperature of 310.0 k
Why is it extremely dangerous to attempt to carry out a distillation in a completely closed apparatus ( one with no vent to the atmosphere
how many grams of methanol must be added to 7.50 kg of water to lower its freezing point to -13.0 degrees c? for each
Which one of the following electron configuration would corresponds to ground states and which to excited states: A)1s2 2s2 2p1 B)1s22p1 C)1s2 2s2 2p13s1 D)1s2 2s2 2p63s2
a 25g sample of alloy at 95 degrees celsius is placed in 50.g of water at 20 degrees celsius if the final temperature reached by the alloy sample and water is 27 degrees celsius what is the specific heat?
What is the purpose of washing the alkyl halide with aqueous sodium bicarbonate (NaHCO3)? Write the reactions that are expected to occur when the sodium bicarbonate is added to the test tube. Why is it important to add the sodium bicarbonate slowl..
Dentists might use a mixture of 40% N2O and 60% O2 as an initial anesthetic of nitrous oxide(although exact proprtions may vary). Determine the entropy of mixing for 1 mole of such a mixture. Assume ideal gas conditions.
a)Calculate the theoretical yield of when 109g of C2H6 reacts with 228g Cl2 of , assuming that and react only to form C2H5Cl and HCl .
what is the molarity of a 99.O mL ethanol solution containing 8.11g of ethanol (C2H5OH)
three hundred gallons of a mixture containing 75.0 wt ethanol and 25 water mixture specific gravity 0.877 and a
The Nernst equation is used to predict the impact of concentration on the cell potential. What value of slope does the Nernst equation predict
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