Methyl cation, anion, and radical. Methyl cation. The methylium cation (CH3+) exists in the gas phase, but is otherwise not encountered. Some compounds are considered to be sources of the CH3+ cation, and this simplification is used pervasively in organic chemistry.
The square foot (plural square feet; abbreviated ft 2 or sq ft) is an imperial unit and U.S. customary unit (non-SI, non-metric) of area, used mainly in the United States and partially in Canada, United Kingdom, Hong Kong, Bangladesh, India and Pakistan. It is defined as the area of a square with sides of 1 foot.
and square feet to square meters. (sq ft to sq m) The square meter (plural form: square meters; British spelling: square metre; symbol or abbreviation: sq m or Sq m or m2) is a derived unit of area used in SI system (Metric System). One square meter = 10.7639104 square feet (sq ft).