Answer:
Molar mass of P₂O₅ = 141.948 g/mol which is approximately 142 g/mol.
Explanation:
Molar mass of AlCl₃
Molar mass = 26.982 + 35.5 × 3 = 133.32 g/mol
Molar mass of BaCl₂
Molar mass = 137.33 + 35.5 × 2 = 208.33 g/mol
Molar mass of MgCl₂
Molar mass = 24.305 + 35.5×2 = 95.305 g/mol
Molar mass of P₂O₅
Molar mass = 30.974×2 + 16× 5 = 141.948 g/mol
Answer:
[tex]P_2O_5[/tex]
Explanation:
Molecular formulas is the actual number of atoms of each element in the compound. Molecular mass is the sum of the mass of each element which is present in the molecular formula is multiplied by their subscript which appear in the molecular formula.
The formula is = [tex]AlCl_3[/tex]
Mass from the formula = 1×Mass of Aluminum + Mass of Chlorine×3 = 1×27 + 35.5×3 = 133.5 g/mol
The formula is = [tex]BaCl_2[/tex]
Mass from the formula = 1×Mass of Barium + Mass of Chlorine×2 = 1×137 + 35.5×2 = 208 g/mol
The formula is = [tex]MgCl_2[/tex]
Mass from the formula = 1×Mass of Magnesium + Mass of Chlorine×2 = 1×24 + 35.5×2 = 95 g/mol
The formula is = [tex]P_2O_5[/tex]
Mass from the formula = 2×Mass of Phosphorus + Mass of oxygen×5 = 2×31 + 16×5 = 142 g/mol
Hence, correct answer is:- [tex]P_2O_5[/tex]
