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Two 2.2 kg physical science textbooks on a bookshelf are 0.31 m apart. What is the magnitude of the gravitational attraction between the books?
What mass of NaOH (s) must be added to 1.0 L of 0.050 M NH3 to ensure that the percent ionization of NH3 is no greater than 0.0010%? Assume no volume change on addition of NaOH. Kb NH3=1.8 x10^-5
Calculate the pH of a solution formed by mixing 100.0 mL of 0.20 M HClO with 200.0 mL of 0.30 M KClO. The Ka for HClO is 2.9 × 10-8.
Question- Hydrogen has an electronegativity value between boron and carbon and identical to phosphorus. With this in mind, rank the following bonds in order of decreasing polarity. Use the appropriate symbol to separate substances in the list.
Using A flow diagram, show the separation of a mixture containing p-bromoacetanilide, N-cyclopentyl-N-methyl-N-propylamine (N means the group is attached to the nitrogen of the amine) and m-nitrophenol.
Describe and discuss both chemical and real-life examples of colligative properties.
Find the Anode Half-Reaction, Cathode Half-Reaction and Volts, Lit. of the following cells Ag-Cd, Ag-Cu, Ag-Pb, Ag-Zn, Cd-Cu, Cd-Pb, Cd-Zn, Cu-Pb, Cu-Zn and Pb-Zn
An industrial hygienist conducting personal sampling on a worker who is overseeing a production process involving use of acetone (Note: The Occupational Safety and Health Administration has established a Permissible Exposure Limit of 1000 parts..
A solution is prepared by dissolving 0.23 moles of hydrofluoric acid and 0.27 moles of sodium fluoride in water sufficient to yield 1.00L of solution. What is the pH after the addition of 0.05 mole of HCl. Assume that the volume does not change. (..
A compound consist of 40.00% carbon, 6.71% hydrogen and 53.29% oxygen and has a molecular mass of 180+- 1g/mole. Determine the empirical and molecular formulas of the compound.
When the D line of sodium light impinges an air-diamond interface at an angle of incidence of 30 degrees, the angle of refraction is 11.9 degrees. What is nD for diamond
An unknown organic compound is mixed with 0.5190 g of naphthalene crystals to give a mixture having a total mass of 0.5959 g. The mixture is heated until the naphthalene melts and the unknown substance dissolves.
Calculate the mass of carbon dioxide produced from 39.4g of octane in this reaction: 2C8H18 + 25O2 to 16CO2 + 18H20
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