A. Cr⁺¹ + Sn⁺⁴ ⇒ Cr⁺³ + Sn⁺² Cr⁺¹ ⇒ Cr⁺³ + 2e⁻ The half-reaction of oxidation: chrome is an electron donor, losses 2 electrons ie it is oxidized 2e⁻ + Sn⁺⁴ ⇒ Sn⁺² The half-reaction of reduction: tin is an electron acceptor, receives 2 electrons, ie it is reduced
b. 3Hg⁺² + 2Fe ⇒ 3Hg + 2Fe⁺³ 2Fe ⇒ 2Fe⁺³ + 6e⁻ The half-reaction of oxidation: iron is an electron donor, losses 3 electrons ie it is oxidized 6e⁻ + 3Hg⁺² + ⇒ 3Hg The half-reaction of reduction: mercury is an electron acceptor, receives 2 electrons, ie it is reduced <span> c. 2As + 3Cl</span>₂ ⇒ 2AsCl₃ 2As ⇒ 2As⁺³ + 6e⁻ The half-reaction of oxidation: arsenic is an electron donor, losses 3 electrons ie it is oxidized 6e⁻ + 3Cl₂ ⇒ 6Cl⁻ The half-reaction of reduction: chlorine is an electron acceptor, receives 1 electron, ie it is reduced <span> d. NaBr + Cl</span>₂ ⇒ NaCl + Br₂<span> </span>2Br⁻ ⇒ Br₂ + 2e⁻ The half-reaction of oxidation: bromine is an electron donor, losses 1 electron ie it is oxidized 2e⁻ + Cl₂ ⇒ 2Cl⁻ The half-reaction of reduction: chlorine is an electron acceptor, receives 1 electron, ie it is reduced
e. Fe₂O₃ + 3CO ⇒ 2Fe + 3CO₂ 3C⁺² ⇒ 3C⁺⁴ + 6e⁻ The half-reaction of oxidation: carbon is an electron donor, losses 2 electrons ie it is oxidized 6e⁻ + 2Fe⁺³ ⇒ 2Fe The half-reaction of reduction: iron is an electron acceptor, receives 3 electrons, ie it is reduced
The sample will lose half of its mass after 4 hours. The half life. 82=4 The sample will lose half of the remaining four after another half life. 42=2 Hope this helps! :)
The main factor is the size of the moon. which is small compared to the earth, meaning that the moon has less gravity, and more gas is allowed to escape the surface, Which basically means theres no atmosphere.
