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Imagine that you are a charge nurse in a nursing home. You are typically the only medical personnel in the house at any one time. A patient who is known to have excess stomach acid asks you to give him an antacid tablet. The typical antacid is either calcium carbonate or magnesium carbonate. The antacid tablet that you stock requires 25.82 mL of 0.200 M HCl to titrate to its equivalence point. Assume that stomach acid has a pH of 1.1. Also, suppose that the patient's size and weight indicate that his stomach will hold approximately 140 mL of stomach acid.
Imagine that you are a geologist trying to determine the amount of iron in the samples of rocks in a mountain side. A typical reaction used to determine the amount of iron in a sample is to combine it in a reaction with permanganate ion, MnO4-, with Fe2+ in an acidic solution. The skeleton reaction is: MnO4-(aq) + Fe2+(aq) à Mn2+(aq) + Fe3+(aq)
Explain if a 60 gram laboratory mouse is exposed to 20.3 rad of radiation, Explain how much energy in Joules was absorbed by the mouse's body
Calculate the partial pressure of carbon dioxide in the associated soil atmosphere.
a bomb calorimeter whose components have a heat capacity of 6.66 kjdegc is filled with 913 g of water. the amount of
For the endothermic equilibrium CaCO3(s) + NH4+(aq) + SO42+(aq) -> CaSO4(s) + NH3(g) + HCO3-(aq), explain the best set of changes to apply in order to increase product yield effectively.
How much heat is required to raise the temperature of a mole of oxygen from 298 to 3000 K at constant pressure. The book gives the following values for Cp (specific heat at constant pressure): 29.376 J/(K*mol) at 298 K and 39.884 J/(K*mol) at 3000 ..
to make up a solution of phosphate buffered saline pbs you need 5mm na2hpo4 anhydrous fw 141.96 0.15 m nacl fw 58.44
The solubility of strontium fluoride (SrF2) in water is 111.5 mg/L. What is Ksp for strontium fluoride (molar mass = 125.62 g)?
Consider a stoppered flask containing benzene, iodine, and air, which has reached equilibrium at 298K. Which one of the following statements concerning the system at equilibrium is true?
Another sample of the same compound, of mass 4.14 g yielded 2.11 g of so3. A third sample of mass 5.66 g, yielded 2.27 g of hno3. Calculate the empirical formula of the compound.
Calculate the molar gibbs energy of fusion (melting) for water at -3degree and 1bar, given that Cp(s)=38J/kmol Cp(l)=75.3j/kmol
Glyoxyl, used in textiles; maleic acid, used to retard oxidation of fats and oils; and acontic acid, a plasticizer, all have the same empirical formula, CHO
A mixture of He, Ne, and Ar has a pressure of 21.7 atm at 28.0 °C. If the partial pressure of He is 2.66 atm and that of Ar is 1.71 atm, what is the partial pressure of Ne?
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