D) physical and chemical changes
Answer:
Explanation:
Divide both of the like fractions, then multiply the answers even if their iregular.
A molecule of the compound carbon dioxide contains one atom of the element carbon and two atoms of the element oxygen. Each oxygen atom shares a double bond with the carbon atom.
A mole is a unit to describe an amount of something/specific substance. Typically standard for measuring a large quantity of small entities like atoms, molecules, or other particles.
Au^2S^3+ 3H^2 = 2Au + 3H^2S
