What is the activity (in Bq) of a sample of Cs-137 if 12.1 years ago it was recorded to have an activity of 5499.9 Bq.

Q: P Question 7 What is the effective nuclear charge for lodine? O +53

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Q: 1. Which of the following objects will have the longest de Broglie wavelength? (A) an electron…

A: Answer) De broglie wavelength depends on speed of the object as well as mass of the object.  De…

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Q: pls solve this problem with in 1 hour. Explain it also. I will give multiple upvote.

A: Aldehyde is treated with grignard reagent followed by hydrolysis to give alcohol RMgX is called…

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A: Given that -  Weight of crucible = 14 g Weight of crucible + sample = 15.2 g Weight of crucible +…

Q: Experiment 10: Chemical Equilibrium DATA SHEET Parts A and B: Equilibrium involving Thymol Blue Part…

A: Equilibrium involving thymol blue:

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Q: 47. What is the pH of the buffer that results when 4.2 g of NH; (MW = 17.03 g/mol) and 4.6 g of…

A: The pH can be calculated as follows

Q: 800 705 kJ 600-- ---- 497 kJ PE (kJ) 400 200 175 kJ 100 Reaction Progress Created by E. Lee for…

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Q: A sample of oxygen gas is collected over water. If the pressure inside the collection tube is 748.2…

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Q: b. Rank by rate of electrophilic aromatic substitution. The compound that reacts the fastest in an…

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Q: Which type of battery is rechargeable? A) alkaline battery C) dry cell B) button battery D) lead…

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Q: CH3 KBRO3 + HBraq. НОАС H3C P. +

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Q: a covalent compound.

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Q: Question I1 For the reaction at 25°C:CdICd"| Fe* Fe Determine E De ter w AG° mine De termine K

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Q: what titrant will you use in preparing a substance with a pH of 7(green) whereupon the addition of…

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Q: 1750gt x II X 10 dl 1.os67 gt x IL

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Q: 9. The free radical bromination of cis-1,2,3-trimethylcyclopropane yields equal amounts of (S)-…

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Q: Draw the structures of all 3 resonance hybrid forms of the benzenonium intermediate for both o and p…

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Q: You have a sample of Co-60. On the sample, it is recorded that the activity of the cobalt was…

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A: Esterification  involve the formation of ester by condensation reaction of alcohol with acid.

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Q: What alkylbromide is needed to prepare Hexane-2-thiol? Show the wwwm reaction.

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