The maximum allowable concentration of carbon monoxide in urban air is 10 mg/m3over an eight-hour period. At this level, what mass of CO in grams is present in a room measuring 8.0 x 12.0 x 20.0 ft ?

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

The answer will be c

Answeropposite;