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The concentration of a drug in the body is often expressed in units of milligrams per kilogram of body weight. The drug is eliminated metabolically by a first-order process having a rate constant of 5.39 × 10-3 min-1. What must the initial dose of the drug be in order for the drug concentration 2.39 hours afterward to be 4.5 mg/kg body weight?
if 135 g of steam at 100 degrees C and 475 g of ice at 0 degrees C are combined, what is the temperature of the resultant water, assuming that no heat is lost?
Draw the skeletal structure of the organic species containing the carbonyl functionality needed to form 3-ethyl-1-pentanol upon metal-catalyzed hydrogenation.
[H+] of the rainfall over Washington, DC is 3.163*10-5 moles/liter. what is the ph of the rainwater
The density of titanium is 4.51 g/cm^3. What is the volume (in cubic inches) of 4.0lb of titanium. Express your answer using two significant figures.
Calculate the equilibrium [F-] in a saturated solution of CaF2 and 0.0223 M Ca(NO3)2. Take ionic strength effects into account.
The density of air at ordinary atmospheric pressure and 25 degrees C is 1.19 g/L. What is the mass in kilograms of the air in a room that measures 8.2 m x 13.5 m x 2.75 m
Based on the reaction of halide ions NaI,NaBr,NaCl with KMnO4 rank the three halide ions in order of decreasing reducing agent strength. Use to indicate greater strength and = to mean equall strength.
The two new DNA molecules formed in replication. The nucleotides in the backbone of DNA are held together by bonds.
A certain weak base has a Kb of 8.70 × 10-7. What concentration of this base will produce a pH of 10.10
If a few drops of water on the outside of the hot water syringe used to dispense the 5.00 mL sample into the calorimeter well for the Kcal determination fell into the well
boyles apprentice observes that the air trapped in air tube occupies 24.8 cm3 at 1.12 atm.by adding mercury to the tube
What happens when the external pressure is lower than the vapor pressure of a liquid in a container?
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