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Question
A 19-year-old woman is brought to the hospital with severe asthma at 1 pm. Her initial plasma concentration of theophylline is 135 mg/mL. If the half-life of the drug is 12 hrs, what will be the plasma concentration of the drug at 5 pm that same day?
What is the volume of the solution that would result by diluting 70.00 mL of 9.19×10-2 M {\rm NaOH} to a concentration of 1.60×10-2 M
What is the maximum mass, in kilograms, of (NH4)2U2O7 that can be formed from the reaction of 100 kg of water and 100 kg of ammonia with 481 kg of UO2SO4?
all oxygen gas from a 10.0-L container at a pressure of 202 kPa is added to a 20.0-L container of hydrogen at a pressure of 505 kPa. after the transfer, what are the partial pressures of oxygen and hydrogen?
Squalene is an important acyclic hydrocarbon whose molecular formula is C30H50. How many pi-bonds does squalene have? explain and show calculation.
When 0.60 grams of a molecular covalent compound is dissolved in 10 grams of water, the freezing point of the soludion is -1.86 C. Given that the freezing point of pure water is 0 C and that the freezing point depression constant for water is 1.85..
When 99% of the glycine is in its -NH3+ form, what is the numerical relation between the pH of the solution and the pKa of the amino group
a couple drops of phenophalein indicator and then was titrated with 8.1mL of NaOH until it turned pink. what is the concentration of NaOH?
In this discussion you are to explain how chemical energy is linked to the conservation of energy in a living organism.
The volume of a sample of nitrogen is 6.00 liters at 35oC and 740 torr. What volume will it occupy at STP?
A molecule having a molar mass of 190.3 g/mol crystallizes to a cubic solid where each edge of the unit cell is 638.0 pm. Each unit cell contains 2 molecules. What is the bulk density of the crystal
Standard Temperature and Pressure of Chlorine, Chlorine is widely used to purify municipal water supplies and to treat swimming pool waters. Suppose that the volume of a particular sample of Cl2 gas is 8.70 L at 895 torr and 240C.
While connected in a battery under standard conditions, label the reduction and oxidation for each pair of half cells noted below. Utilize a table of standard reduction potentials.
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