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The LD for a drug is the dose that would be fatal for 50% of the population. The LD for aspirin in rats is 1.75 grams per kilogram of body weight. Compute how many aspirin tablets a human weighing 155 pounds would have to take to reach this dosage. (1 aspirin = 5 grains = 325mg).
How many moles and number of ions of each type are present in the following aqueous solution. 471 ml of 0.21g aluminum sulfate/L
Two unknowns, X and Y, both having the molecular formula C4H8O, give the following results with four chemical tests. Propose a structure for Y consistent with this information. Bromine Na metal Chromic acid Lucas reagent Cpd X decolorizes bubbles ..
The heat capacity of the solid lead oxide is given by:Cp = 44.35 J/K/mol + 1.47*10^-3 T J/K^2 Calculate the change in enthalpy of 3.25 mol of PbO(s) if it is cooled from 750 K to 300 K at constant pressure
what is the composition of the vapor of a pentane-hexane solution that has a vapor pressure of 357 torr at 25c vapor
dichloromethane and carbon tetrachloride... what are thepartial pressures of these substances in the vapor above a
Ascorbic acid, HC6H7O3, also known as vitamin C, is a weak acid. It is an essential vitamin and an antioxidant. A solution of ascorbic acid is prepared by dissolving 2.00 grams in enough water to make 100.0 mL of solution
For the unbalanced equation _Al+_O2=_Al2O3. How many moles are needed to form 2.3 moles of aluminum oxide.
For the reaction given below at 700°C, Kc = 0.534. H2(g) + CO2(g) reverse reaction arrow H2O(g) + CO(g) Calculate the number of moles of H2 that are present at equilibrium
The masses of the unknown and the solvent (water) were determinded, and the unknown completely dissolved in the water. Just before the jacketed test tube containing the unknown solution was placed in the ice-salt water bath
Consider 3 amino acids A, B, and C. How many trimeric isomers would be formed. Show them.
if 28ml of 6.2 m sulphuric acid was spilled determine what is the minimum mass of sodium bicarbonate or sodium hydrogen
Calculate what will be the amount of heat, q, absorbed by the calorimeter apparatus also express your answer in kJ? (heat capacity = 2.677 x 103 J/K)
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