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MA_775_DIABLO [31]
3 years ago
10

Bismuth-210 has a half life of 5.0 days if you had a sample of 60.00g of Bismuth-210 how much would be left after 15 days? (Show

Your Work)
Chemistry
1 answer:
Zielflug [23.3K]3 years ago
5 0

Answer:

7.5 gm left

Explanation:

Bismuth-210 has a half life of 5 days

15 days is 15/5 = 3 half lives

since half the amount is left in 5 days or 1 half life

(1/2) x (1/2) x (1/2) the staring amount would be left in

3 half lives. so 1/8 is left

(1/8) x 60.0 = 7.5 gm left

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                  Al - Aluminium, Pb(NO3)2 -  Lead(II) nitrate.

  • The chemical name for product side:

                  Al(NO3)3 - Aluminium nitrate, Pb - lead.

<u>Explanation</u>:

  • This is an oxidation-reduction (redox) reaction:

                       3 Pb^{II} + 6 e- → 3 Pb^{o} (reduction)

                       2 Al^{o} - 6 e- → 2 Al^{III} (oxidation)

Pb(NO3)2 is an oxidizing agent, Al is a reducing agent.

  • Reactants:                              

                                    Al uminium

              Names: Aluminum, Aluminium powder,  Al

              Appearance: Silvery-white-to-grey powder, Silvery-white,  

                                      malleable, ductile, odorless metal.

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              Other names: Lead nitrate, Plumbous nitrate, Lead dinitrate

              Appearance: White colorless crystals,  White or colorless crystals

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                            Al(NO3)3 – Aluminium nitrate

              Other names: Nitric Aluminum salt, Aluminum nitrate,

                                       Aluminium(III) nitrate

              Appearance: White crystals, solid | hygroscopic

                                   Pb  - lead

              Names: Lead, Lead metal, Plumbum

              Appearance: Bluish-white or silvery-grey solid in various forms.

                                     Turns tarnished on exposure to air. A heavy, ductile,

                                     soft, gray solid.

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