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What is the pH of a 0.125 mol/L solution of boric acid (H3BO3 Ka = 5.8 x 10-10)? Include a Bronsted-Lowry equation and a Ka expression for full marks.
When the two cylinders are connected and the gases mixed, the pressure in each cylinder becomes 8.71 atm. What is the volume of cylinder B?
How might technology aid the practice phase of your speech presentation?
An ionic compound forms when calcium (Z = 20) reacts with iodine (Z = 53). If a sample of the compound contains 1.20 1019 calcium ions, how many iodide ions does it contain?
Write Lewis structures and describe the molecular geometry at each carbon atom in the following compounds- cis-3-hexene and cis-1-chloro-2-bromoethene
If a breath of air, with a volume of 0.50 L, is drawn into the lungs and comes to thermal equilibrium with the body at 37°C while the pressure remains constant, calculate the increase in enthalpy of the air if the initial air temperature is 20 °C ..
If a mixture of 35.8 g of CH4 and 75.5 g of S reacts, how many grams of H2S are produced? CH4(g)+4S(g)-->CS2(g)+2H2S(g).
Calculate the standard emf of a cell that uses the Mg/Mg^2+ and Cu/Cu^2+ half cell reactions at 25?C. Write the equation for the cell reaction that occurs standard-state conditions.
An airplane is pressurized to 650 {rm mm,Hg}, which is the atmospheric pressure at a ski resort at 1.30×104 {rm ft} altitude. If the partial pressure of oxygen drops below 100 {rm mm,Hg}, passengers become drowsy.
Assume that you carry out the reaction with 25.0 gr of cyclohexane (limiting reactant). What is the theoretical yield of adipic acid. If you obtain 33.5 gr of adipic acid, what is the % yield for the reaction
The concentration of a biomolecule inside a rod-shaped prokaryotic cell is 0.0045 M. Calculate the number of molecules inside the cell, which is 5.0 ?m long and 1.4 ?m in diameter.
based on the synthesis chart provided in the organic course noteswhat is the smallest number of synthetic steps needed
a gas-filled balloon having a volume of 2.50 l at 1.2 atm and 25degc is allowed to rise to the stratosphere about 30 km
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