Question

Explanation and answer and you’ll get brain list

Answer 1

Answer:

Option B.

Explanation:

• 2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂

First we convert 9.90 g of Pb(NO₃)₂ into moles, using its molar mass:

• 9.90 g ÷ 331.2 g/mol = 0.0299 mol Pb(NO₃)₂

Then we convert moles of Pb(NO₃)₂ into moles of PbO, using the stoichiometric coefficients:

• 0.0299 mol Pb(NO₃)₂ * $\frac{2molPbO}{2molPb(NO_3)_2}$ = 0.0299 mol PbO

Now we convert 0.0299 mol PbO into grams, using its molar mass:

• 0.0299 mol PbO * 223.2 g/mol = 6.67 g PbO

So 6.67 g is the theoretical yield. With that in mind we calculate the percent yield:

• % yield = 5.51 / 6.67 * 100 % = 82.6%

So the correct answer is option B.