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An archaeological sample contains .755 curies of lead-206 and 1.455 curies of uranium-238. Assume that all the lead now present in the rock came from the radioactive decay of the uranium and that no appreciable amounts of other radioactive nuclides are present in the sample. The half-life of uranium-238 is 4.51 x 109 years. What is the age of the sample?
if you want to have a water-salt solution that freezes at -10degc what mass of nacl must you add to 3.0 kg of water?
A silver block, initially at 56.8 degrees C, is submerged into 100.0g of water at 24.7 degree C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 27.8 degrees C
If 10 grams of an organic layer is extracted with an additional amount of fresh water, how much benzoic acid would be present in the organic layer
A 9.55 gram sample of solid sodium hydroxide dissolves in 100.0 grams of water in a coffee-cup calorimeter, the temperate rises from 23.6 degrees Celsius to 47.4 degrees Celsius. Calculate enthaply( in kJ/mol NaOh) for the solution process.
hard water is hard because it contains ca2aq and mg2aq ions. it can be softened by adding borax powder which is sodium
Name a compound with the formula, C5H12, which will show only one peak in the NMR spectrum.
For the molecule CH3COOCH3, indicate the orbitals involved in the bonding of the carbon and oxygens. Draw a picture to show how the orbitals overlap in both cases.
Question- Change the unit for the Electric Field from V to kV by clicking once above the unit. Observe the spot as you increase the Electric Field strength from 0 kV to 5 kV. The movement is slight so pay careful attention. Which direction is the ..
From equation E=kQ1Q2/d as well as the ionic radii given in the figure, compute the potential energy of the subsequent pairs of ions. Presume that the ions are separated by a distance equal to the sum of their ionic radii.
State the mass and charge balance equations for a solution that is 0.15 M in NaF as well as saturated with CaF2.
What will be the direction of the reaction when the reactants and products have the following concentrations; CS2=0.14M, Cl2=).18 M,CCl4=0.28 M, and S2Cl2=0.20 M
Based on the fact that the alloy has an HCP crystal structure, what general processing technique would you consider for the processing of the turbine blade? Explain your choice.
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