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.
One square foot is one foot wide by one fooâ¦t tall (1 ft x 1 ft = 1 sq ft). Actually you can't measure how many feet are in a square foot since one is distance and the other area. for example, a rectangle that is 0.25ft by 4 ft would have a area of one square foot and a perimeter of 8.5 feet. there are an infinite combination of perimeters that would make up a square foot.