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A student placed 16.0 g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.ml mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 55.0 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? Express your answer numerically in grams.
A student measures the conductivity of an Fe2(SO4)3 solution and determines it to be a strong electrolyte. The student incorrectly lists the species in solution as O-2, S-2, Fe+3. Give the correct list of species in the solution.
Calculate the amount of heat (cal) necessary to convert 34g of ice at -3oC into liquid water at 25oC.
The mechanism by which these compounds kill insects and people is unknown. D. These compounds kill insects and people by stimulating acetylcholinesterase, an enzyme of the nervous system.
Derive the activation energy for the reaction that has a rate constant of 3.5 x 10^-5 s-1 at 25C and the rate constant of 4.8 x 10^-4 s-1 at 45C.
A bottle of wine contains 12.5% ethanol by volume. The density of ethanol is 0.789 g/cm3. Calculate concentration of ethanol in wine in terms of mass percent and molality.
After the reaction was complete, nitric acid was added to dissolve the AgSO3 but not the AgSe. The Ag+ from the dissolved Ag2SeO3 and the excess reagent required 16.74mL of 0.01370 M KSCN in a Volhard titration. How many milligrms of Se were conta..
A 45.5g sample of copper at 99.8 Celsius is dropped into a beaker containing 151 g of water at 18.5 Celsius.
What is the value of Ksp for Ag2SO4 if 5.40 g is soluble in 1.00 L of water?
a buffer solution is prepred by adding 5.50g of ammonium chloride and 0.0188 mol of ammonia to enough water to make 155mL of solution a) What is the pH of the buffer
an a group metal m reacts with chlorine and oxygen to form ionic compounds with the formulas mcl4 and mo2. propose a
The average pH of precipitation in rural areas is 5.80. Assuming that the pH is controlled by the carbonate system, i.e., no anthropogenic acid gases are present in the atmosphere.
Estimate the molecular weight of a polymer if a 100.-mL solution of 6.5 g of the polymer in toluene has an osmotic pressure of 0.044 atm at 27°C.
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