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The "big 4" in 4H2 refers to the four hydrogen (H) atoms in the chemical compound. The "2" indicates that there are two molecules of the compound. Therefore, 4H2 represents a molecule composed of four hydrogen atoms.
(2 + 12) ÷ 2 = 7 Note: mean is the same as average.
Plus mean Example:2+2=4 It mean to add with your finger or on a piece of paper
If you mean 2/2 then the quotient is 1
2