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abruzzese [7]
2 years ago
15

Explanation and answer and you’ll get brain list

Chemistry
1 answer:
Flura [38]2 years ago
5 0

Answer:

Option B.

Explanation:

  • 2Pb(NO₃)₂ → 2PbO + 4NO₂ + O₂

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

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

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

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

Now we<u> convert 0.0299 mol PbO into grams</u>, using its molar mass:

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

So <em>6.67 g is the theoretical yield</em>. With that in mind <u>we calculate the percent yield</u>:

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

So the correct answer is option B.

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