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What is the age of a rock whose Argon 40 / Potassium 40 ratio is 1.55? The half life of Potassium 40 is 1.28 x 10^9 years.
the particle , electron is in lowest possible enrgy state. what is the probability of finding electron between 0.2 nm to 0.35 nm from one side of the wall.?
A generic salt, AB3, has a molar mass of 183 g/mol and a solubility of 6.60 g/L at 25 °C. What is the Ksp of this salt at 25 °C
Calculate the percent yield if the actual yield of aluminum oxide is 0.423mol.
How many moles of each of the following were in the original sample? What is the molecular formula?
Calcium phosphide reacts with water according to the equation. Using 84.0g of Ca ?P? and 36.0g of H?O, What volume of PH? will be produced at 273 K and a pressure of 1520 torr? Ca?P? + H?O --> Ca(OH)? + PH?
Calculate the change in pH when 6.00 mL of 0.100 M NaOH(aq) is added to the original buffer solution.
Write a reaction mechanism for the reaction between 2,3-dimethyl-3-hexanol with hydrochloric acid. (B) What is the reaction mechanism type for this reaction
If equal volumes of BaCl2(aq) and NaF(aq) solutions are mixed together, which will NOT give a precipitate (Ksp of BaF2 = 1.7 x 10-7)?
Determine the pressure, in torr and atm, of 3.94 mol carbon monoxide gas in a 4.25 Litre tank at temperature 31 degrees Celsius.
if 10.7 ml of a 0110 m naoh is required to reach the first equivalence point of a solution of citric acid how many ml
What is the pressure exerted in the closed end of an apparatus if the atmospheric pressure is 720 torr and the height of the water column is 22.3 cm?
How many liters of water are required to dilute 6.23mL of 12.2M HClO4 to make a solution with a pH of 2.34? Write your answer as 1.2E1L
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