Question

what does the number 4 represent in 4nh₃?

Explanation:

In a chemical formula like \(4NH_3\), the number in front (in this case, 4) is called a coefficient. A coefficient indicates the number of molecules of the substance. Here, it means there are 4 molecules of ammonia (\(NH_3\)). A subscript (like the 3 in \(NH_3\)) indicates the number of atoms of an element in a molecule. A superscript is used to show charge (e.g., \(Na^+\)) and is not relevant here.

Answer:

Coefficient