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.
Depending on the manufacturer, a gallon of paint will cover 300 to 400 square feet. Check with your paint vendor, or on the paint manufacturerâs website, to find the estimated coverage. Once you know the coverage rate of your chosen paint, you need to calculate the square footage of the walls or ceilings to be painted. To get this figure, simply multiply the width by the height (for walls) or the length by the width (for ceilings).