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A lead bullet is fired at a wooden plank. At what speed must bullet travel to melt on impact, if its initial temperature is 25oC and the heating of the plank is neglected?
A 1.0 L buffer solution is 0.250 M LiC2H3O2 and 0.050 M HC2H3O2 . Which of the actions will destroy the buffer? (a)adding 0.050 moles of LiC2H3O2(b)adding 0.050 moles of HCl(c)adding 0.050 moles of HC2H3O2(d)adding 0.050 moles of NaOH.
Compute the hydroxide ion concentration in a NH 3 solution that is 0.091 M and 0.028 M NH 4 Cl. Kb of NH 3 is 1.8 x 10 -5 .
Sulfur-38 has an atomic mass of 38.0 and a half-life of 2.87 hours. How long will it take for 99.99% of a sample of sulfur-38 to decay.
Calculate the molecule weight of the liquid If 2.31grams of the vapor of a volatile liquid is able to fill a 498-ml flask at temperature of 100 degree Celsius and pressure of 775 mm Hg? also determine the density of the vapor under these conditi..
Determine the mole fraction of HO2CCH2CHOHCO2H in this solution?
What is the mass of sodium ion circulating in the blood if the concentration of sodium ion in this individual is 0.135M.The average adult has a total blood volume of 5 liter.
Calculate the work done (in joules) against a pressure of 1.0 atm at 25 o C. If 3 moles of H 2 react with 3 moles of Cl 2 to form HCl while
Determine how much silver ion(Ag+) is left in solution if you mix 0.10 mole of silver nitrate AgNO3 with 0.20 mole of sodium hydroxide NaOH to make a one litre solution.
A mixture of CO2 and N2 gases has an experiment density of 21922 mol/m3 at T=225K and Pressure= 68.759 MPa and Z=1.67661. What is density of this mixture of gases in mol/m3 by Peng-Robinson equation of state? (Mole fraction of Co2= 10.56%)
Rubidium has two naturally occurring isotopes with the following masses and natural abundances, Calculate the atomic weight of rubidium.
Given the values of ΔH ° rxn , ΔS ° rxn , and T below, determine ΔS univ. ΔH ° rxn = 80kJ , ΔS rxn = 143J/K , T= 299K Express your answer using two significant figures.
Determine What is the final concentration and calculate what is the Ksp of this salt at temperature of 25 degrees Celsius?
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