Question

subscripts are also used with parentheses to show how many of each atom are present. to find the number of each atom, take the subscript that is outside of the parentheses and multiply it to the amount of each atom for every element. for example, we already know that this formula (c₃h₆o)₆ shows 6 molecules of rubbing alcohol. take the 6 and multiply it by the amount of each atom there is for every element. there are 18 atoms of carbon shown here (6x3) there are 48 atoms of hydrogen shown here (6x8) there are 6 oxygen atoms shown here (6x1) write the amount of each atom in the examples below. 8. (h₂o)₃ there are — atoms of hydrogen and — atoms of oxygen 9. (c₅h₁₂o)₄ there are — atoms of carbon, — atoms of hydrogen, and — atoms of oxygen

Explanation:

Step1: Analyze formula $(H_2O)_3$

For hydrogen, inside the parentheses the sub - script of hydrogen is 2, and outside is 3. So number of hydrogen atoms = 2×3 = 6. For oxygen, inside the parentheses the sub - script of oxygen is 1 (implicit when not written), and outside is 3. So number of oxygen atoms = 1×3 = 3.

Step2: Analyze formula $(C_5H_{12}O)_4$

For carbon, inside the parentheses the sub - script of carbon is 5, and outside is 4. So number of carbon atoms = 5×4 = 20. For hydrogen, inside the parentheses the sub - script of hydrogen is 12, and outside is 4. So number of hydrogen atoms = 12×4 = 48. For oxygen, inside the parentheses the sub - script of oxygen is 1 (implicit when not written), and outside is 4. So number of oxygen atoms = 1×4 = 4.

Answer:

1. 6 atoms of hydrogen, 3 atoms of oxygen
2. 20 atoms of carbon, 48 atoms of hydrogen, 4 atoms of oxygen