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A flask contains a mixture of compounds A and B. Both compounds decompose by first-order kinetics. The half-lives are 55.0 min for A and 26.00 min for B. If the concentrations of A and B are equal initially, how long will it take for the concentration of A to be four times that of B?
students are advised to dispose of the 95% ethanol mother liquor from the recrystallization step n the nitration of bromobenzene in a waste bottle for halogented wastes while the same solvent used for the recrystallization
If the pressure of gaseious chloroform in a flask is 195 mm Hg at 25 degrees celsius and its density is 1.25 g/l, what is the molar mass of chloroform?
If you want to feed everyone, but still have equal numbers of buns and hot dogs, what is the minimum number of packages of buns and hot dogs you need, respectively?
Calculate the % atom economy for the following two methods for converting benzene, C6H6, to aniline, C6H5NH2.
What mass of magnesium, in reaction with an excess of hydrochloric acid, is needed to produce 128 mL of hydrogen (H2) gas. The H2 gas is collected over water at a temperature of 25°C and a total pressure (PBR) of 762 mmHg
2NOCl(g) = 2NO + Cl2 When 3.00 mol of NOCL is heated to a given temp. in a 2.00 L container, 1.70 fol NOCL remain at equilibrium. a.) Calculate the equilibrium concentration of each substance in the reaction
if 2.325g of an unknown acid compound is made up to 200.0 mL with water. 10.00 mL of the resulting solution requires 15.43 mL of 0.1808 M NaOH.
which 1.0 m acid solution has the largest concentration of hydronium
Consider the titration of 40.0 mL of 0.171-M of KX with 0.141-M HCl. The pKa of HX = 10.89. Give all pH values to 0.01 pH units. a) What is the pH of the original solution before addition of any acid
Another experiment shows that vitamin B6 is made up of 14.89% N. What is the simplest formula for vitamin B6. The answer should be C17H20N4O6.
What is an alternative analytical procedure for determining the quanity of water in a non-aqueous sample?
Calculate the pH of the solute in an aqueous solution of 0.372 M (CH3)3N(aq) if the Kb is 6.5 Ã- 10âˆ'5.
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