Question

li₂o
express your answer in atomic mass units to two decimal places.
formula mass = amu
make certain you are using atomic masses that are as precise as possible. keep as many digits throughout the calculations as possible, and only round the final result to two decimal places. no credit lost. try again.

Explanation:

Step1: Identify atomic masses

The atomic mass of Li (lithium) is approximately 6.94 amu and the atomic mass of O (oxygen) is approximately 15.999 amu.

Step2: Calculate formula mass of Li₂O

The formula mass of Li₂O is calculated as \(2\times\) (atomic mass of Li)+(atomic mass of O). So, \(2\times6.94 + 15.999=13.88+15.999 = 29.879\) amu.

Step3: Round the result

Rounding 29.879 amu to two - decimal places gives 29.88 amu.

Answer:

29.88 amu