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.
Painting the House Yourself. Add up the cost of all the supplies you will need such as paint, rollers and brushes. One gallon of paint covers approximately 350 to 400 square feet. The cost of the paint can vary a lot depending on the quality of the paint you buy and whether it is interior or exterior paint.ne gallon of paint covers approximately 350 to 400 square feet. The cost of the paint can vary a lot depending on the quality of the paint you buy and whether it is interior or exterior paint.