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Review | Constants Periodic Table The half-life for the radioactive decay of C-14 is 5730 years. Part A How long will it take for 20% of the C-14 atoms in a sample of C-14 to decay? You may want to reference (Pages 635 - 641) Section 14.4 while completing this problem. Express your answer using two significant figures. ΥΠ ΑΣφ years Request Answer Submit Part B If a sample of C-14 initially contains 1.1 mmol of C-14, how many millimoles will be left after 2230 years? Express your answer in millimoles using two significant figures.

Answer 1

Martat sme radioactive decay fallows ist ander konetics. kt = in Carl . a z mital amount 22 amount ob decay. t; in combo) tiin (e) 16209 72103 = 1844.6 years. ♡ (t = 1800 years

Parl-B let = in ca) az Initaial amount arr = amount left 10 2097 X15" syster" x 22 36 ye fors in / li mimol I (9-x) , 1. 30928 2 ll. mmol -)) .: Ca-se ) icl mimo) 1.3096 are = 0.8399 Mmo! i. Amount lett = [0.84 mmoll