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A 1.000-g sample of stannous fluoride gives a 1.175-g precipitate of stannous phosphate. Compute the theoretical yield and percent yield of Sn3(PO4)2
The equilibrium constant Kp is measured (at an unspecified temperature) to be 0.66 for the reaction:
In the Ritalin Synthesis, why is p-PhLi (phenyl lithium) used instead of cuprate? What does cuprate do? And why doesn't the alkyllithium add twice
Geologists can estimate the age of rocks by their uranium-238 content. The uranium is incorporated in the rock as it hardens and then decays with first-order kinetics and a half-life
Acetic acid (C2H4O2) is weak acid. Write the equilibrium chemical equation for an aqueous solution of acetic acid. Derive the acid dissociation constant (Ka) from the chemical equation at equilibrium.
calculate the work done by the gas in each case. For He, Cp= 20.79 J/K/mol and Cv= 12.38 J/K/mol, which may be taken as independent of temperature.
At 9.°C and 1.40 atm pressure, a sample of helium gas occupies a volume of 5.10 L. The sample is compressed and heated to 60.°C. Calculate the final pressure of the sample, if the final volume is 3.64 L.
Calculate the pH of a solution formed by mixing 172.0 mL of 0.100 M NaF and 201.0 mL of 0.025 M HCl.
Calculate the pH of a buffer made by mixing 50.0mL of 0.10M acetic acid (HC2H3O2) with 50.0mL of 0.10M sodium acetate (NaC2H3O2)
Explain how many electrons are in a completed valence shell of most second period atoms while they combine with other atoms to become molecules
a solution was prepared by mixing 50 ml of 0.100 M HCl with enough water to get 250 ml solution . what is the M of the final solution of hydrochloric acid?
a 0.187-g sample of a co32- antacid is dissolved with 25.0 ml of0.0984m hcl. the hydrocloric acid that is not
What are the concentrations of HSO4-, SO42-, and H+ in a 0.20 M KHSO4 solution? (Hint H2SO4 is a strong acid; Ka for HSO4- = 1.3x10-2)
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