Question

in a chemical formula, how do you calculate the number of atoms of an element within parentheses? by summing the parentheses subscript with the subscript of each element within the parentheses. by dividing the parentheses subscript by the subscript of each element within the parentheses. by multiplying the parentheses subscript by the subscript of each element within the parentheses. part b choose the correct example. mg(c₂h₃o₂)₂, the number of h atoms is 5. mg(c₂h₃o₂)₂, the number of h atoms is 3. mg(c₂h₃o₂)₂, the number of h atoms is 6. mg(c₂h₃o₂)₂, the number of h atoms is 2.

Explanation:

In a chemical formula, when calculating the number of atoms of an element within parentheses, we use multiplication. For example, in \(Mg(C_2H_3O_2)_2\), the subscript of \(H\) within the parentheses is \(3\), and the subscript outside the parentheses is \(2\). So we multiply \(3\times2 = 6\) to get the number of \(H\) atoms.

Answer:

For the first question: By multiplying the parentheses subscript by the subscript of each element within the parentheses.
For the second question: \(Mg(C_2H_3O_2)_2\), the number of \(H\) atoms is \(6\).