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A student placed 15.0 g of glucose (rm C_6H_{12}O_6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-rm mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 45.0-rm mL sample of this glucose solution was diluted to 0.500 rm L. How many grams of glucose are in 100. rm mL of the final solution?
Calculate the amount of heat transferred when 45.0 g of CH3OH(g) is decomposed by this reaction at constant pressure.
calculate the equilibrium partial pressures of all gases in the reaction and set up the expression for Kp in terms of equilibrium partial pressures but do NOT solve.
Two determinations of the dissolved oxygen content of a 200 mL sample of water, made five days apart, gave 5.3 ppm and 2.2 ppm of dissolved O2 respectively.
Calculate the number of grams of alcohol present in 1.00 L of 69 proof gin. The density of ethanol is 0.798 g/mL.
The major product of the acid-catalyzed dehydration of heopentyl(2,2-dimethyl-1-propanol) has a different carbon skeleton than that of the starting alcohol
Would it be a good idea for a person to take a couple of aspirin tablets before attending a cocktail party? Explain your reasoning. This needs to be from a chemistry stand point.
The half-life of radon-222 is 3.8 days. How much of a 100 g sample is left after 15.2 days?
use maxwell distribution of speeds to estimate the fraction of CO2 molecules at 300K that have speeds in the range 200 to 250 m/s.
Discuss in detail, one way in which atomic nuclear decay takes place. What is the significance of atomic nuclear decay? Analyze the societal implications of using this process.
Compute the activation energy for the flashing process. When At 29 o C the average rate is 3.3 flashes every 10 seconds; at 23 degree Celsius the average rate
what is the number of valence electrons for nh4+ and what is the lewis structure for that molecule. and how many remaining electrons are there and how do you find the formal charge.
Calculate the pH of a 0.42 M solution of sodium acetate, CH3COONa. (Ka(acetic acid) = 1.8 x 10-5 )
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