which of the following compounds has the largest molar mass?\no nh₃\no co\no ch₄\no hf

Answer

Explanation:

Step1: Recall molar - mass formula

Molar mass is the sum of the atomic masses of all atoms in a compound. Use the atomic masses: $H = 1\ g/mol$, $N=14\ g/mol$, $C = 12\ g/mol$, $O = 16\ g/mol$, $F=19\ g/mol$.

Step2: Calculate molar mass of $NH_3$

$M_{NH_3}=14 + 3\times1=17\ g/mol$

Step3: Calculate molar mass of $CO$

$M_{CO}=12 + 16=28\ g/mol$

Step4: Calculate molar mass of $CH_4$

$M_{CH_4}=12+4\times1 = 16\ g/mol$

Step5: Calculate molar mass of $HF$

$M_{HF}=1+19 = 20\ g/mol$