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The half-life of radon-222 is 3.8 days. How much of a 100 g sample is left after 15.2 days?
What property of the atom did Moseley associate with the wavelength of X-rays emitted from an element in his experiments?
Given Data; P4+6Cl2=4PCl3 change temp= -2439 kj ,4PCl5=P4+10Cl2 change temp= 3438 kj calculate change in temp for the reaction PCl5=PCl3+Cl2.
The following data were obtained for the determination of iron in serum by a spectrophotometeic method. Assuming the validity of Beer's Law for the experiment calcualte the concentration of iron in serum
Calculate the concentrations of all species in a 1.08 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
Important information about AP Chemistry a. S(2)O(3)^2- (aq)+I(3)^- (aq) ->S(4)O(6)^2- (aq) + I^- (aq) b. Mn^2+(aq) + HBiO(3) (s) ->MnO(4)^- (aq) + Bio^+ (aq) (acid)
Determine the percent yield for the reaction and also find out at which point the total pressure = 188 torr.
100 mL of 0.200 M HCl is titrated with 0.250 M NaOH .What is the pH of the solution at the equivalence point?Express the pH numerically.
This is a fact that Bromine(Br) is larger than chlorine(Cl) but indication of equilibrium constant suggests that a bromo substituent has a less preference for the equatorial position than chloro substituent? Explain it briefly?
Survival of Fish in Freezing Water, Fish produce glycerol to survive the freezing waters of the Arctic. Determine the degree to which the freezing point of blood and other biological fluids is lowered with the help of glycerol.
When a container is filled with 3.00 moles of H2, 2.00 moles of O2, and 1.00 mole of N2, the pressure in the container is 465 kPa. What is the partial pressure of O2
you dissolve 15.0g of sucrose C12H22O11 in a cup of water (225g) what is the freezing point of solution (kf of water is -1.86).
A sample of He gas (V = 3.0 L) at 5.6 atm and 25 °C was combined with 4.5 L of Ne gas at 3.6 atm and 25 °C in a 9.0 L flask (which was initially evacuated).
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