Astudent reacted nis2 (mm = 122.83 g/mol) with o2 (mm=32.00 g/mol) to make so2 (mm=64.07 g/mol) according to this balanced equation
2nis2+5o2=2nio+4so2
if (1.50x10^2) g of nis2 were reacted with (2.420x10^2) g of o2 what would be the theoretical yield of so2
enter in scientific notation

Theoretical yield of SO₂ is 1.56 × 10² g

Explanation:

Given data:

Mass of NiS₂ = 1.50 ×10² g

Mass of O₂ = 2.420 ×10² g

Theoretical yield of SO₂ = ?

Solution:

Chemical equation:

2NiS₂ + 5O₂ → 2NiO + 4SO₂

Moles of NiS₂:

Number of moles = mass/ molar mass

Number of moles = 1.50 ×10² g / 122.83 g/mol

Number of moles = 1.22 mol

Moles of O₂:

Number of moles = mass/ molar mass

Number of moles = 2.420 ×10² g / 32 g/mol

Number of moles = 7.56 mol

Now we compare the moles of SO₂ with  NiS₂ and O₂.

                  NiS₂            :      SO₂

                    2                :        4

                   1.22             :       4/2×1.22 = 2.44

                    O₂               :          SO₂

                     5                :           4

                     7.56           :           4/5×7.56 =6.05

Moles of SO₂ produced by NiS₂ are less it will limiting reactant.

Mass of SO₂ = moles × molar mass

Mass of SO₂ = 2.44 mol ×  64.07 g/mol

Mass of SO₂ = 156.33 g

So theoretical yield of SO₂ is 1.56 × 10² g