- Lithium has Z =3
Electronic configuration is given by
- 1s orbital is filled
- 2s orbital is unfilled
So
- unpaired electrons=1
[Send a message] as you move across a row from left to right in the period table, atomic numbers of the elements
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We know, change in temperature is given by :
Putting all given values, we get :
Hence, this is the required solution.
Mass of Al₂(SO₄)₃ : 4.822 g
<h3>Further explanation </h3>A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.
Reaction
2AlCl₃ + 3(NH₄)₂SO₄⇒Al₂(SO₄)₃+ 6NH₄Cl
MW AlCl₃ :133,34 g/mol
MW (NH₄)₂SO₄ : 132,14 g/mol
MW Al₂(SO₄)₃ : 342,15 g/mol
mol AlCl₃
mol (NH₄)₂SO₄
Limitng reactants (ratio mol : coefficient = the smaller)
AlCl₃ : (NH₄)₂SO₄ =
(NH₄)₂SO₄ ⇒ limiting reactants
So mol Al₂(SO₄)₃ from (NH₄)₂SO₄
mass Al₂(SO₄)₃
with 54.2% yield, the mass of Al₂(SO₄)₃