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.
Report Abuse. Depends on how much wall space you have to cover. A gallon of paint covers about 400 sq. ft. and costs about $25. a gallon. So you need to start measuring, take your measurements for each room and the paint personnel will help you figure out how much paint you need per room.ou can figure $1.00 per sq. ft. which includes materials (average quality paint $23 per gallon) this however, this price does not typically include ceilings or doors and baseboards. This is assuming you are asking how much for someone else to do it.