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Radiocarbon dating of plants and animals.
How many years will it take for carbon-14 to diminish to 1% of the original amount after the death of a plant or animal? Use the formula A=A0e(-0.000124t). Compute the answer to three significant digits.
When silver tarnishes, silver metal reacts with the element sulfur to form a gray deposit of Ag2S. If Ag reacts with S to form this compound, identify which element is being oxidized and which is being reduced. Explain h ...
Write three reactions for the oxidation of pyrite and explain how these can result in the production of acid waters that are enriched in trace metals and metalloids.
1) What is the mass of 38 molecules of SO 3 in g? 2) What volume in L of chlorine at 30 o C and 743 torr is required to react completely with 4.76 g aluminum: 2Al(s) + 3Cl 2 (g) → 2AlCl 3 (s) Calculate the moles chlorin ...
Titanium reacts with hydrogen peroxide in 1.00 M sulfuric acid to form a colored complex. If a 2.00x10^-5 M solution absorbs 31.5% of the radiation at 415 nm, what would be: the absorbable, the transmittance, and the per ...
Assignment Part 1 1. The pH scale is generally considered as a scale from 1 to 14. State a value of pH considered to be: a. acidic b. basic c. neutral 2. The acid in our stomach is used to break down food proteins and ki ...
Determine the percent yield(with respect to CO2 and CH4) of the reaction if 1.25g of CO2 was formed by reacting 2.50g of CH4(g) with excess O2 in the reaction: CH4(G) +O2(g) ---->CO2(g) +H2O(g).
a) Draw all possible stereoisomers of 1,4-dimethylcyclohexane. b) What is the stereo chemical relationship between all of them? c) Rate them according to their stability.
For this question imagine that sea water is a 3.5 mass % solution of NaCl with a density of 1.00g/mL. Assume full dissociation of the NaCl. a) Calculate the freezing point of sea water.Briefly explain why it is not 0 (de ...
One method to produce nitrogen in the lab is to react ammonia with copper (II) oxide: NH3(g) + CuO(s) Cu(s) + H2O(l) + N2(g). After using 40.0 grams of NH3, 15.5 grams of N2are produced. What is the percent yield of nitr ...
Calculate the change in internal energy(delta E) for a system that is giving off 25.0kJ of heat and is changing from 6.00L to 12.00L in volume at 1.50atm pressure. (101.3J=1 L*atm) The answer is supposed to be -25.9kJ Ca ...
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