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.
2. Estimate the amount of paint, with a gallon of primer, or base paint, covering 330 square feet and a gallon of other paint providing coverage up to 350 square feet. 1  The composition of base paint is different, which is why it covers fewer square feet per gallon. 2  Paint costs can range from $15 to $60 per gallon.