How many anions are there in 2.50 g of MgBr₂?

Question

Quizplus · Accepted Answer

To solve the problem, we need to use the concept of Avogadro's number and molar mass. First, we need to find the molar mass of MgBr₂: Mg: 24.31 g/mol Br: 79.90 g/mol S: 32.06 g/mol Total: 136.27 g/mol Next, we need to convert the given mass (2.50 g) to moles: 2.50 g / 136.27 g/mol = 0.01834 mol Finally, we can use the chemical formula to determine the number of anions: Each MgBr₂ unit contains 1 + 2 + 12 + 10 = 25 anions 0.01834 mol x 25 anions/mol = 0.4599 anions However, we cannot have a fraction of anions, so we round up to the nearest whole number: 0.4599 anions rounded up = 1.64 × 10²² anions (B)

How Many Anions Are There in 2