Final answer:
The formula mass of carbon tetrachloride (CCl4) is 153.81 amu.
Step-by-step explanation:
The formula mass of carbon tetrachloride (CCl4) is calculated by adding up the average atomic masses of its constituent atoms. In this case, we have 1 carbon atom and 4 chlorine atoms. The average atomic mass of carbon is 12.01 amu, and the average atomic mass of chlorine is 35.45 amu. So, the formula mass of carbon tetrachloride is:
(12.01 amu) + (4 × 35.45 amu) = 12.01 amu + 141.8 amu = 153.81 amu