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A 0.0188 g sample of a non-electrolyte isolated from throat lozenges was dissolved in enough water to make 10.0 mL of solution at 25 degrees celsius. The osmotic pressure of the resulting solution was 4.89 atm. How do you calculate the molar mass of this compound?
What is the mass percent composition of oxygen in a compound having the empirical formula C20H40O1?
In a first order decomposition reaction, 50.0% of a compound decomposes in 17.5 min. what is the rate constant of the reaction
If the mobile phase flow rate is 0.4 m/min, what is the analyte linear migration rate, and how long is the column?
Explain why the Beer-Lambert law, stating that light absorbance is proportional to concentration, eventually becomes invalid at high concentrations of the solute being measured
convert the composition of the following alloy from atom percent to weight percent a 44.9 at of silver b 46.3 at of
A 50 mL soln. of Mg(NO3)2 is mixed with a 50 mL solution of NaOH. The resulting precipitate, Mg(OH)2, that forms is 2.97g. Determine the concentration of solution of Mg(NO3)2?
What is the empirical formula? What is the molecular formula? How many grams of oxygen gas were used to oxidize the original 2.035 grams of compound?
25 ml of 0.1002 ha was titrated with 10 ml of 0.1997 naoh ph is 4.46 what is the ka value? and what is the ph at
A solution of formic acid (HCOOH, Ka = 1.8 x 10^-4) has a pH of 2.70. Calculate the initial concentration of formic acid in this solution.
If hydroxide ion is formed, the OH- may react with some of the Fe3+ to produce an insoluble hydroxide. Will the percent yield of the iron (III) compound containing a complex ion be affected by the formation of the insoluble hydroxide
a food chemist combusts 56g of a chocolate bar in a calorimeter containing 1.5 l of water density water 1g1ml. the
which of the following would not be a suitable solvent for a grignard reaction and why? hexane methanol dimethyl ether
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