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What is the final dilution obtained after each dilution series shown below? Express each answer in exponential numbers.
a. 1:10, 1:10 and 1:100:?b. 10^-1, 10^-1, and 10^-2:?c. 10^-3 and 10^-5:?
What is the percent yield of a reaction in which 41.5 g tungsten (VI) oxide is combined with excess hydrogen gas to produce metallic tungsten
In the preparation of the esters given in this experiment, the reaction product was extracted with 5% sodium bicarbonate solution in the isolation step. Why? What gas was evolved during this washing step? Write a balanced equation for the reaction..
The measured density of a certain gaseous amine at 0 C as a function of pressure is: P(atm) 0.200 0.500 0.800
What is the wavelength of the photons emitted by hydrogen atoms when they undergo n=4 to n=2 transitions in nm?
In May 1990 the French TGV train traveled the distance from Paris to Lille, France (127 miles) in .819 hours. What was the speed of the TGV in m/s?
The solubility of compound A in ethanol is .8g/100 mL at 0 degrees and 5.0g/100mL at 78. What is the minimum amount of ethanol needed to recrystallize a 12.0g sample of compound A
Write a balanced equation for the combustion of butane gas. If at a given moment butane is reacting at a rate of 0.400 mol L?1s?1, what are the rates of formation of products?
Use reduction-potential values to explain which halides can be oxidized by Fe3+ or by MnO4- in acidic solution?
Mixed 1.15g of Na2HPO4 (MW=142g/mol) and 2g NaH2PO4 (MW=138 g/mol) in 1L of water. What is the concentration of your buffer and what is the pH
Show how you can separate a racemic mixture of R,S-lactic acid in its pure enantiomers using a chiral amine of choice. Draw the reactions using structural formulas and describe the process
what is the final volume in mL when 5.00 mL of a 12.0 M NaOH solution is diluted to each of the following concentrations a).600 M NaOH. b)1.00 M NaOH. c)2.50 M NaOH.
For a particular reaction, deltaH is -93.8kJ and deltaS is -156.1 J/K. Assuming these values change very little with temperature, over what temperature range is the reaction spontaneous in the forward direction?
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