Respuesta :
1) we find out the atomic mass of these elements (Al, S, O)
Atomic mass (Al)=27 amu
Atomic mass (S)=32 amu
Atomic mass (O)=16 amu
2)Now, we calculate the molar mass of Al₂(SO₄)₃
molar mass=2(27)+3[32+4(16)]=54+3(32+64)=54+3(96)=54+288=342 g/mol.
answer: 342.17 g/mol.
Atomic mass (Al)=27 amu
Atomic mass (S)=32 amu
Atomic mass (O)=16 amu
2)Now, we calculate the molar mass of Al₂(SO₄)₃
molar mass=2(27)+3[32+4(16)]=54+3(32+64)=54+3(96)=54+288=342 g/mol.
answer: 342.17 g/mol.
Answer:
342.17 g/mol
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.
Given,
The formula is = [tex]Al_2(SO_4)_3[/tex]
Mass from the formula = 2×Molar mass of Aluminium + 3×Molar mass of sulfur + 12×Molar mass of Oxygen
Molar mass of Aluminium = 27.00 g/mol
Molar mass of sulfur = 32.06 g/mol
Molar mass of Oxygen = 15.99 g/mol
So,
Mass from the formula = 2×27.00 + 3×32.06 + 12×15.99 g/mol ≅ 342.17 g/mol
