Gaseous carbon monoxide reacts with hydrogen gas to form gaseous methane (ch4) and liquid water.

Solid iron(iii) oxide reacts with hydrogen gas to form solid iron and liquid water.

When iron rusts, solid iron reacts with gaseous oxygen to form solid iron(iii) oxide.

When the following equation is balanced the coefficients are

Liquid octane reacts with oxygen gas to form carbon dioxide gas and water vapor.

Solid aluminum sulfide reacts with water to form solid aluminum hydroxide and gaseous hydrogen sulfide.

How many moles of o2 are in the chemical equation when balanced using the lowest whole numbers?

The scientific principle which is the basis for balancing chemical equations is