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A 1.00 g sample of carbon from rolls of parchment found near the dead sea undergoes 1.4 x 10 * 4 decay of carbon-14 in 20 h. What is the approximate time passed since one were used to make these rolls knowing that for a living one gram of carbon produced 15.3 disintegrations per minute.
They were oxidized to convert all the sulfur to sulfate ion, which was precipitated by adding an excess of barium chloride solution. The mass of BaSO4 obtained was 0.5032g. What is the average mass percent of saccharin in the tablets
given that the density of elemental mercury is 13.534g/mL, how many atoms of mercury are contained in 1.500mL of element?
A concentration of 0.5 ppm by volume SO2 in air is harmful to plant life. What is the percent by volume of this concentration
what is the vsepr formula for the nitrogen atom as the central atom in
A sample of 6.022 g of CH4 is enclosed in a 12 L container at 402 K. What is its pressure in atmospheres
For an amino acid titration experiment explain how to find ratio moles NaOH over moles amino acid (equivalents)
a sealed balloon is filled with 1.40 l of helium at 23degc and 1.00 atm. the balloon rises to a point in the atmosphere
a 270- flask contains pure helium at a pressure of 761 . a second flask with a volume of 455 contains pure argon at a
A blending process, shown in Figure Q2.7, mixes component A into a stream. The objective is to maximize the amount of A in the stream without exceeding.
The volumes listed correspond to the ½ equivalence point, equivalence point, 1 ½ equivalence point, and 2 equivalence point. The pH will equal pKa2 at the 1 ½ equivalence point, which is 11.55. Therefore, the [H+] = 10^(-11.55) = 2.81 x 10-12
What is the equilibrium partial pressure of Cl2 at 250 oC? What is the value of Kc at the same temperature?
Based on your knowledge of the mechanism involved in the nitration of methyl benzoate, what role(s) would you expect sulfuric acid to play in the nitration of benzaldehyde?
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