Mr C's Visual Acuity Is 20/50

question 18

Multiple Choice

Mr. C's visual acuity is 20/50. This means that he

• A)can see 50% of what the average person sees at 20 feet.
• B)has perfect vision when tested at 50 feet.
• C)can see 20% of the letters on the chart's 20/50 line.
• D)can read letters while standing 20 feet from the chart that the average person could read at 50 feet.
• E)is legally blind.

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Definitions:

Nitrogens

A rephrasing of "Nitrogens" would be: Chemical elements with the symbol N, essential for all living organisms as a constituent of proteins and nucleic acids.

HCN Bond Angle

The angle between the hydrogen, carbon, and nitrogen atoms in hydrogen cyanide, typically close to 180 degrees due to its linear molecular shape.

Hydrogen Cyanide

A highly toxic and volatile chemical compound with the formula HCN, characterized by a distinctive bitter almond odor.

Hybridization

The concept in chemistry where atomic orbitals mix to form new hybrid orbitals, which are suitable for the pairing of electrons to form chemical bonds in molecular compounds.