li₂o\nexpress your answer in atomic mass units to two decimal places.\nformula mass = \nsubmit request…

li₂o\nexpress your answer in atomic mass units to two decimal places.\nformula mass = \nsubmit request answer\npart b\nc₈h₁₈\nexpress your answer in atomic mass units to two decimal places.\nformula mass =

li₂o\nexpress your answer in atomic mass units to two decimal places.\nformula mass = \nsubmit request answer\npart b\nc₈h₁₈\nexpress your answer in atomic mass units to two decimal places.\nformula mass =

Answer

Explanation:

Step1: Find atomic masses of elements

The atomic mass of Li is approximately 6.94 amu and of O is approximately 16.00 amu. For $C_{8}H_{18}$, the atomic mass of C is approximately 12.01 amu and of H is approximately 1.01 amu.

Step2: Calculate formula - mass of $Li_{2}O$

The formula - mass of $Li_{2}O$ is calculated as $2\times$ (atomic mass of Li)+(atomic mass of O). So, $2\times6.94 + 16.00=13.88 + 16.00 = 30.88$ amu.

Step3: Calculate formula - mass of $C_{8}H_{18}$

The formula - mass of $C_{8}H_{18}$ is calculated as $8\times$ (atomic mass of C)+$18\times$ (atomic mass of H). So, $8\times12.01+18\times1.01 = 96.08+18.18=114.26$ amu.

Answer:

Part A: formula mass = 30.88 amu Part B: formula mass = 114.26 amu