Chemistry, 10.01.2020 06:31 cutebab4786
The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time t and has a half life of 3.3 hours. if 1 gram of this isotope is present initially, how long will it take for 90% to decay?
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Write two balanced equations 1. dissolving of solid sodium hydroxide in water 2. the reaction of sodium hydroxide solution with hydrochloric acid
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Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.
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Which type of bonding involves the complete transfer of a valence electron from a less electrogrative atom to a more electronegative one
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When you perform this reaction, what could remain at the end of the reaction? check all that apply. excess reactant aqueous copper chloride excess reactant aluminum oxygen product solid copper carbon dioxide product aqueous aluminum chloride water
Answers: 2
The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time...
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