The age of wine can be determined by measuring the trace amount of radioactive tritium, 3H, present in a sample. Tritium is formed from hydrogen in water vapor in the upper atmosphere by cosmic bombardment, so all naturally ocurring water contains a small amount of this isotope. Once the water is in a bottle of wine, however, the formation of additional tritium from the water is negligible, so the tritium initially present gradually diminishes by a first-order radioactive decay with a half-life of 12.5 years. If a bottle of wine is found to have a tritium concentration that is 0.176 that of freshly bottled wine (i.e. [3H]t = 0.176 [3H]0), what is the age of the wine?

(#27) Reaction rates and decay. Tungsten undergoes first order decay to yield its isotope, with all reaction components in gaseous form. The initial concentration is 1.00 M and the rate constant at 45 degrees Celcius is 6.94 x 10 6/minute. (27a) What is the final concentration of the reactant remaining after 120 days? Type-in your answer inblank#1. The unit is Molarity but enter only the value of your answer in normal numerals (without symbols of unit and no digit or space fillers) with four significant figures. (276) Calculate the percentage amount of the original reactant that has decomposed from the above decay. Type-in your answer in Blank #2. The unit is % but enter only the value of your answer in normal numerals (without symbols of unit) with four significant figures.

K is 3.30 x 10^-2. If the original amount of lead-210 in a sample is 70.8 mg, how much lead -210 remains after 20.6 years have passed

What does the following equation represent? Ca5(PO4)3OH -----> 5 Ca²+ + 3 PO4³- + OH* the production of calcium ions in milk. the production of phosphate in soft drinks. the formation of base (OH-) in cheese production. O coral formation. the loss of bone material. None of these options is correct. O

Kindly write the full solution on a paper, much obliged

A reaction was run in a vessel attached to a manometer that initially had the same level of mercury in both tubes. Based on the change of in the level of mercury in the figure, which reaction must have occurred? Explain. a) 2NaN3(s)à  2Na(s) +3N2(g) b) Cl2 (g) + 2Br-(aq)à Br2(aq) + 2Cl-(aq) c) C2H6(g) à C2H4(g) + H2(g) d) H2(g) + I2(g) à 2HI(g)

3) Carbon-14 is constantly being produced in the upper atmosphere, and the amount is in equilibrium. As long as an organism is alive, it keeps its carbon isotopes in balance with the atmosphere, but at soon as it dies, it stops taking up new 14C, and so the geologic clock starts. You found a shell buried in sedimentary layers, which has 6% of its original 14C left. Determine the age of the shell. Show your work.