Question

question 16 of 20
what is a large number written before a compound in a chemical reaction called? (5 points)
a. coefficient
b. subscript
c. superscript
d. roman numeral

Explanation:

In a chemical reaction, a coefficient is a large number written before a compound. For example, in the equation \(2H_2O\), the number \(2\) is the coefficient. A subscript is a small number written after an element symbol (e.g., \(H_2O\), the \(2\) is a subscript). A superscript is used in other contexts like exponents (\(x^2\)) or in ions (\(Na^+\)). Roman numerals are used in naming some compounds (e.g., Iron(III) oxide) but not as a large number before a compound in a chemical reaction.

Answer:

A. coefficient