Answer:
B) P₂O₅
Step-by-step explanation:
A) MgCl₂
Molar mass of Mg = 24
Molar mass of Cl = 35.5
Molar mass = 24 + 2×35.5 = 95 g/mol
B) P₂O₅
Molar mass of P = 31
Molar mass of O = 16
Molar mass = 31 ×2 + 5×16 = 142 g/mol
C) BaCl₂
Molar mass of Ba = 137.33
Molar mass of Cl = 35.5
Molar mass = 137.33 + 2×35.5 = 208.33 g/mol
D) AlCl₃
Molar mass of Al = 27
Molar mass of Cl = 35.5
Molar mass = 27 + 3×35.5 = 133.5