A compound with the formula TeCl_n has a formula mass of 269.41 amu. What is the value for n in the formula TeCl_n?

Question

Quizplus · Accepted Answer

- The formula mass of the compound is 269.41 amu, which means the sum of the molar masses of all the atoms in the compound is 269.41 g/mol.
- To calculate the molar mass of the compound, we need to know the molar masses of each element present. We can look these up on the periodic table:
  - Te (tellurium) has a molar mass of 127.60 g/mol
  - Cl (chlorine) has a molar mass of 35.45 g/mol
  - S (sulfur) has a molar mass of 32.06 g/mol
  - B (boron) has a molar mass of 10.81 g/mol
- Using these values, we can calculate the molar mass of the compound as follows:
  - Te: 1 x 127.60 g/mol = 127.60 g/mol
  - Cl: 1 x 35.45 g/mol = 35.45 g/mol
  - S: 2 x 32.06 g/mol = 64.12 g/mol
  - B: n x 10.81 g/mol = 10.81n g/mol
- Total molar mass = 269.41 g/mol
- Substituting the calculated values into the equation and solving for n:
  - 127.60 + 35.45 + 64.12 + 10.81n = 269.41
  - 227.17 + 10.81n = 269.41
  - 10.81n = 42.24
  - n = 3.9
- The value of n must be a whole number, so the closest choice is C, n = 4.

A Compound with the Formula TeCln Has a Formula Mass

A Compound with the Formula TeCl_n Has a Formula Mass