Question

calculate the formula mass for barium chloride. express your answer in atomic mass units to two decimal places. formula mass = amu submit request answer

Explanation:

Step1: Determine the formula of barium chloride

Barium chloride has the formula \( BaCl_2 \) (barium is \( Ba^{2+} \), chloride is \( Cl^- \), so two chlorides balance one barium).

Step2: Find atomic masses

Atomic mass of Ba: \( 137.33 \) amu (from periodic table), atomic mass of Cl: \( 35.45 \) amu.

Step3: Calculate formula mass

Formula mass = (mass of Ba) + 2×(mass of Cl)
\( = 137.33 + 2\times35.45 \)
\( = 137.33 + 70.90 \)
\( = 208.23 \) amu.

Answer:

208.23