Batteries Used in Watches Contain Mercury(II)oxide

question 59

Multiple Choice

Batteries used in watches contain mercury(II) oxide.As the current flows,mercury(II) oxide is reduced to mercury according to the following reaction: HgO(s) + H₂O( ) + 2 e^- → Hg( ) + 2 OH^-(aq)
If 2.3 × 10^-5 amperes flows continuously for 1200 days,calculate the mass of mercury,Hg( ) ,produced.

• A) 2.5 g
• B) 5.0 g
• C) 9.9 g
• D) 13 g
• E) 15 g

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Definitions:

Dominant Genes

Genes that overpower their recessive counterparts and determine the phenotype of an organism.

Heterozygous Pairs

In genetics, refers to a pair of genes where one is dominant and the other is recessive; they're different alleles for a specific trait.

Gonads

The reproductive organs in animals and humans that produce gametes; testes in males and ovaries in females.

Adrenal Glands

Small glands located on top of each kidney, responsible for producing hormones that regulate metabolism, immune system, blood pressure, and stress responses.