In old-time photography flash bulbs were made by burning magnesium metal to produce a very bright light. How many molecules of O2 is needed to completely burn 12.0 g of magnesium.

The answer is b because a,c,and d are opinons

There are no metaphors.

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic