31 select the correct answer. what is the molar mass of alcl3? a. 62.43 g/mol b. 116.39 g/mol c. 124.86…

31 select the correct answer. what is the molar mass of alcl3? a. 62.43 g/mol b. 116.39 g/mol c. 124.86 g/mol d. 133.33 g/mol e. 187.29 g/mol

31 select the correct answer. what is the molar mass of alcl3? a. 62.43 g/mol b. 116.39 g/mol c. 124.86 g/mol d. 133.33 g/mol e. 187.29 g/mol

Answer

Answer:

D. 133.33 g/mol

Explanation:

Step1: Identify atomic masses

From the periodic - table, the atomic mass of Al (aluminum) is approximately 26.98 g/mol and the atomic mass of Cl (chlorine) is approximately 35.45 g/mol.

Step2: Calculate molar mass of AlCl₃

The formula for AlCl₃ has 1 Al atom and 3 Cl atoms. The molar mass (M) of AlCl₃ is (M = 1\times26.98+3\times35.45). First, calculate (3\times35.45 = 106.35). Then, (26.98 + 106.35=133.33) g/mol.