Question

what is the molar mass of al2o3? 1 mol al = 26.98 g al 1 mol o = 16.00 g o 1 mol al2o3 = ? g al2o3 round your answer to two decimal places.

Explanation:

Step1: Calculate mass of Al in $Al_2O_3$

There are 2 Al atoms. Mass of Al = $2\times26.98$ g = $53.96$ g

Step2: Calculate mass of O in $Al_2O_3$

There are 3 O atoms. Mass of O = $3\times16.00$ g = $48.00$ g

Step3: Calculate molar mass of $Al_2O_3$

Molar mass = mass of Al + mass of O = $53.96+48.00$ g = $101.96$ g

Answer:

$101.96$