Question

5.) calculate the molar mass of aluminum nitrate (al(no₃)₃. your answer should be rounded to the nearest whole number. (1 point) 165 g/mol 137 g/mol 213 g/mol 171 g/mol

Explanation:

Step1: Identify atomic masses

Atomic mass of Al = 27 g/mol, N = 14 g/mol, O = 16 g/mol

Step2: Calculate molar mass of $Al(NO_3)_3$

There is 1 Al atom, 3 N atoms and 9 O atoms in $Al(NO_3)_3$. Molar mass $M=27+(3\times14)+(9\times16)$
$M = 27 + 42+144$
$M=213$ g/mol

Answer:

213 g/mol