formula mass of Al2(SO4)3 is 342.3. The relative formula mass of an ionic compound is the ratio of the average mass of one formula unit of the ionic compound to the mass of 1/12 the mass of a carbon-12 atom. Thus, to obtain the formula mass of Al2(SO4)3, just add up the relative atomic masses of every atom in one formula unit.
Thus, the relative formula mass of Al2(SO4)3 = 2*27.0 + 3*(32.1+4*16) = 342.3.
Answers & Comments
Answer:
Al2(so4)3
=Al×2+s×32+o×12
=27×2+32×3+16×12
=54+96+192
=342.3.
Explanation:
formula mass of Al2(SO4)3 is 342.3. The relative formula mass of an ionic compound is the ratio of the average mass of one formula unit of the ionic compound to the mass of 1/12 the mass of a carbon-12 atom. Thus, to obtain the formula mass of Al2(SO4)3, just add up the relative atomic masses of every atom in one formula unit.
Thus, the relative formula mass of Al2(SO4)3 = 2*27.0 + 3*(32.1+4*16) = 342.3.
Al- 2 x 27 = 54
S- 3 x 32 = 96
O- 12 x 16 = 192
54 + 96 + 192 = 342
342 g/ mole
tama yung sagot nung nag-answer!! my answer lang is rounded off hehe.