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.
Convert square yards to square feet. (sq yd to sq ft) The square yard (symbol or abbreviation: sq yd or Sq yd, plural form: square yards) is a unit of area used in several different systems, including Imperial units, United States customary units and English units. One square yard = 9 square feet = 0.83612736 square meters = 1296 square inches.