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A sample of chlorine has two naturally occurring isotopes. The isotope Cl-35(mass 35.0 amu) makes up to 75.8% of the sample, and the isotope Cl-37(mass equal to 37.0 amu) makes up 24.3% of the sample. What is the average atomic mass for chlorine?
Identify the nuclide produced when americium-241 decays by alpha emission, 241 / 95 Am→ 4 / 2 He + ? Express your answer as an isotope using prescripts.
Aside from the hazards associated with handling bromine, what is the advantage of generating bromine in this fashion as opposed to adding bromine directly to the reaction mixture.
Use bond energy values to estimate the reaction enthalpy for the formation of ammonia from nitrogen gas and hydrogen gas. Note that N2 contains a triple bond. You will need structural formula.
If 870 gm of NaCl, 416 gm of KMnO4 and 1000 gm of H2SO4 are mixed. which reagent is the limiting reagent
Question- 1. List three ways in which wells in the spot plate could become contaminated, leading to inaccurate results, and discuss how to prevent each.
A certain enriched sample of uranium contains 92.000% U-238 and 8.000% U-235. What is the average atomic weight of the uranium atoms in this sample? The isotopic masses of U-235 and U-238 are 235.0439 amu and 238.0508 amu, respectively.
A 7.0 g sample of a hydrocarbon (a molecule that has only hydrogen and carbon) is subject to combustion analysis. The mass of CO2 collected is 22.0 g. What is the empirical formula of the compound?
1-hexanol was prepared by reacting an alkene with either hydroboration-oxidation or oxymercuration-reduction. Draw the structure of the alkene that was used to prepare the alcohol in highest yield.
If the volume of blood in an adult is 5.0L, what is the mass of HCI that the buffer can neutralize before the pH falls below 7.0
An aqueous solution of calcium hydroxide is standardized by titration with a 0.129 M solution ofhydrochloric acid. If 27.9 mL of base are required to neutralize 17.7 mL of the acid, what is the molarity of the calcium hydroxide solution?
Oxygen coming off the 2nd carbon and the 2nd carbon is also attached to the N. Two Carbons are attached to the Nitrogen). Account for the fact 2 equivalents of amine must be used.
assume that due to dwindling supplies of crude oil and natural gasthe us embarks on a plan to implement the hydrogen
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