To determine the correct subscripts in a chemical formula, take H2O  as an example. H has a charged of positive 1 while O has a charge  of negative 2. To balance out the chaâ¦rges of the two elements, 2 H  cations are needed to balance out O negative 2 cation. This will  result to H2O.
How much area will one gallon of paint cover? Paint coverage is affected by numerous factors: the quality of the paint youâre using, the color youâre covering and the color youâre using. That said, a good rule of thumb is that one gallon of paint will cover between 350 and 400 sq. ft. Planning ahead will help you determine the amount of paint needed for a project.
Select a paint / surface type. Thick or textured paints applied to rough surfaces. 100 sq. ft. per gallon. Conventional paint applied to rough or textured surfaces. 200 sq. ft. per gallon. Paint applied to semismooth surfaces in a heavy coat. 300 sq. ft. per gallon. Most common spread rate wall paint applied by a roller. 400 sq. ft. per gallon.