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Uranium-238 decays very slowly, with a half-life of 4.47 billion years. What percentage of a sample of Uranium-238 would remain after 13.4 billion years.
When a 0.528 g sample of a compound containing only carbon, hydrogen, and oxygen is burned, 0.306 g of water and 0.815 g of carbon dioxide are formed. What is the empirical formula for this compound?
Would 50 g KNO3 completely dissolve in 100 g water at 40 degrees Celcius?
Write an equation for the reaction of the soap sodium oleate with calcium chloride solution.
Calculate the following to determine Kc for FeSCN2+. a,) moles Fe3+ initially present. b.) moles SCN- initially present
The enthalpy change when 1 mol methane (CH4) is burned is -890 kJ. It takes 44.0 kJ to vaporize 1 mol water. What mass of methane must be burned to provide the heat needed to vaporize 1.00 g of water
constant ratenbsp is 3.20times10-4 ms for a zero-order reaction. concentration has dropped to 9.00times10-2 mnbsp after
3.00×10-3 mol of HBr are dissolved in water to make 18.0 L of solution. What is the concentration of hydroxide ions, [OH^-], in this solution?
a 35 mL sample of NaOH solution is titrated to an endpoint by 14.76 mL 0.4122M HBr solutio. what is the molarity of the NaOH solution?
A sample of nitrogen occupies a volume of 546 mL at STP.What volume would nitrogen occupy at 177C under a pressure of 380 torr?
During the isomerization of trans-1,2-dibenzoylethylene C16H12O2 using 95% Ethanol C2H6O , and UV light irradiation. What is the overall equation for this reaction. What is the product.
How many constitutionally isomeric monochlorides can be formed on free-radical chlorination of 2,3,3-trimethylpentane? trimethylpentane + Cl2 reacted with heat
(a) In the acetylene molecule (C2H2), which of the following are present? A) 2 VSEPR electron pairs around each carbon atom B) 3 ? and 1 ? bonds C) 2 ? bonds
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