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.
Once you know the total square footage you need to cover, you need to find the coverage ratio of your paint. Most professionals use the formula of 350 square feet of wall coverage per gallon of paint and 200 square feet of wall coverage per gallon of primer. Itâs important to note that different types and manufacturers may cover more or less area, and different application methods, eg. spraying vs. rolling vs. brushing, will cover differently.