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When an ionic compound such as sodium chloride (NaCl) is placed in water the component atoms of the NaCl crystal dissociate into individual sodium ions (Na+) and chloride ions (Cl-). In contrast, the atoms of covalently bonded molecules (e.g., glucose, sucrose, glycerol) do not generally dissociate when placed in aqueous solution. Which of the following solutions would be expected to contain the greatest number of particles (molecules or ions)?
If an intravenous solution containing 123 mg of a drug substance in each 250-mL bottle is to be administered at the rate of 200mcg of drug per minute,how many milliliters of the solution
An aqueous solution is 28.0% by mass ethanol, CH3CH2OH, and has a density of .957 g/mL. What is the molality of ethanol in the solution
For the oxidation-reduction reaction equation given here, 2Na + S --> Na2S, indicate how many electrons are transferred in the formation of one formula unit of product.
(a) 0.519 M acetic acid (weak acid with Ka = 1.8e-05). (b) 0.802 M hydrocyanic acid (HCN) (weak acid with Ka = 4.9e-10). (c) 0.693 M pyridine (weak base with Kb = 1.7e-09).
question for a given equilibrium reaction at 25 degrees celsius the equilibrium coefficient is 1.5x10 -4. if the value
Distinguish between the kinetics of a reaction and its process towards equilibrium. (Compare/contrast kinetics and equilibrium.)
How many mL of 0.380 M solution can be prepared by dissolving 4.00g of Ca(OH)2 in water?
Using the reaction below determine the limiting reagent, theoretical and % yield. 7.50ml of 1 pentene was allowed to react with 15 ml of HBr (9.0M). If 8.00 mL of 2 bromopentane is isolated what is the % Yield of the reaction
The molecules of a certain gas sample at 313 K have a root-mean-square (rms) speed of 297 m/s. Calculate the most probable speed and the mass of a molecule.
The rate constant for the second- order reaction.starting with a concentration of 0.86m, calculate the concentration of NOBr after 57s.
at 25degc k 0.090 for the following reaction.h2og cl2og reverse reaction arrow 2 hoclgcalculate the concentrations of
a compound has the empirical formula ch2o. when 0.0866 g is dissolved in 1.000 g of ether the solutions boiling point
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