Question

calculate the molar mass of ba(c₂h₃o₂)₂
255.3 g/mol
196.3 g/mol
237.3 g/mol
228.3 g/mol

Explanation:

Step1: Find atomic masses

Atomic mass of Ba: $137.33\ g/mol$
Atomic mass of C: $12.01\ g/mol$
Atomic mass of H: $1.008\ g/mol$
Atomic mass of O: $16.00\ g/mol$

Step2: Determine atom counts

In $\text{Ba}(\text{C}_2\text{H}_3\text{O}_2)_2$:

• Ba: 1 atom
• C: $2\times2 = 4$ atoms (since there are 2 $\text{C}_2$ groups)
• H: $3\times2 = 6$ atoms (since there are 2 $\text{H}_3$ groups)
• O: $2\times2 = 4$ atoms (since there are 2 $\text{O}_2$ groups)

Step3: Calculate total mass for each element

• Mass of Ba: $1\times137.33 = 137.33\ g/mol$
• Mass of C: $4\times12.01 = 48.04\ g/mol$
• Mass of H: $6\times1.008 = 6.048\ g/mol$
• Mass of O: $4\times16.00 = 64.00\ g/mol$

Step4: Sum the masses

Molar mass = $137.33 + 48.04 + 6.048 + 64.00$
Molar mass = $255.418\ g/mol \approx 255.3\ g/mol$

Answer:

255.3 g/mol (corresponding to the yellow option: 255.3 g/mol)