Answer:
43.13Kg of melamine
Explanation:
The problem gives you the mass of urea and two balanced equations:
First we need to calculate the number of moles of urea that are used in the reaction, so:
molar mass of urea =
The problem says that you have 161.2Kg of urea, so you take that mass of urea and find the moles of urea:
161.2Kg of urea2684 moles of urea
Now from the stoichiometry you have:
2684 moles of urea = 447 moles of melamine
The molar mass of the melamine is so we have:
= 5637.64 g of melamine
Converting that mass of melamine to Kg:
5637.64 g of melamine * = 56.38 Kg of melamine, that is the theoretical yield of melamine.
Finally we need to calculate the mass of melamine with a yield of 76.5%, so we have:
%yield = 100*(Actual yield of melamine / Theoretical yield of melamine)
Actual yield of melamine = = 43.13Kg of melamine
Answer:
<em><u>For </u></em><em><u>balancing</u></em><em><u> </u></em><em><u>this </u></em><em><u>equation</u></em><em><u> </u></em>
<em><u>we </u></em><em><u>need </u></em><em><u>to </u></em><em><u> </u></em><em><u>put</u></em>
<em><u>Ag2O</u></em><em><u>. </u></em><em><u>=</u></em><em><u> </u></em><em><u> </u></em><em><u>2</u></em><em><u> </u></em>
<em><u>Ag </u></em><em><u>=</u></em><em><u> </u></em><em><u>4</u></em><em><u> </u></em>
<em><u>O2 </u></em><em><u>=</u></em><em><u> </u></em><em><u>1</u></em><em><u> </u></em>
<em><u>Hope</u></em><em><u> it</u></em><em><u> will</u></em><em><u> </u></em><em><u>help</u></em>
Where is the second picture<span />
A. the nucleus carries a positive charge, and the electron cloud carries a negatuve charge. since neutrons carry no charge, the nucleus composed of neutrons and protons carry a positive charge.