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1. A woman requires taking ibuprofen twice daily in 625mg amount. Each pill in the bottle is 250 mg then determine the number of pills the woman requires to consume each time she needs 625mg dosage? imagine that pills can be cut in half and these are scored too
2. Using a 1 Litre saline solution (308mOsm) determines the effect of osmolality of the solution after adding 10 milli moles of MgCl2 (.95g)?
explain why the compound carbon tetrachloride is completly nonpolar , depite having four polar bond whereas the compound
If 400. mL of NO at STP is reacted with 500. mL of O2 at STP, calculate the partial presure of NO2 after the reaction goes to completion. Assume constant volume.
What speed would an O2 molecule have if it had the same momentum as a photon of 700 nm wavelength
Find the Density of a substance with a mass of 51.2g and a volume of 150mL
A student assay a solution of H3PO4 by titrating 20.00mL of the solution with .01020M NaOH. An endpoint at ph 5 was observed after 10.11 mL of NaOH had been added.
Uranium hexafluoride is a solid at room temperature, but it boils at 56°C. Determine the density of uranium hexafluoride at 62°C at 755 torr.
A balloon holds 2.5 liters of helium at a temperature of 25C and 1 atmosphere of pressure. What volume will the balloon have after it rises to where the atmospheric pressure is 0.8 atmosphere and the temperature is -10C
A saturated solution of PbCl2 is found to contain 2.88*10^-2 M chloride ions. What is the correct value of the solubility product
Calculate the concentrations of H2SO3, HSO3-, SO32-, H3O+ and OH- in a 0.025M H2SO3. The pH is 1.88 and the Ka1= 1.5 x 10-2 and Ka2 = 6.3 x 10-8.
The reducing agent in this catalytic hydrogenation reaction was molecular hydrogen (H2), which was produced in situ during the course of the reaction.
How many grams of benzoic acid would you add to 30 mL of 0.27M sodium benzoate in order to prepare a buffer solution at pH=4.5? Ka of benzoic acid is 6.3E-5.
Write a balanced equation for the reaction of copper with concentrated nitric acid to form copper(II) nitrate. assume that nitric acid is reduced to No2. water is also formed.
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