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
Electromagnetic waves
Unlike mechanical waves, these waves can travel though vacuum because they do not need a medium of travel.
Explanation:
This is how sunlight reaches earth. Sunlight has many wavelengths if electromagnetic waves called an electromagnetic spectrum. The electromagnetic spectrum ranges from the high energy waves called gamma rays (they have the shortest wavelength and highest frequency). On the other end of the spectrum are the lowest energy waves called radio waves (they have the longest wavelength and lowest frequency).
Learn More:
Check more on electromagnetic radiation here;
brainly.com/question/1551400
brainly.com/question/1530050
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Explanation:
Using Charles law;
V1/T1 = V2/T2
Convert your temperatures to kelvin;
20+273=298k
60+273=333k
Then put the values the formula stated above
300/333 = V2/298
Make V2 the subject of the formula
V2= (300×298)/333
V2= 89400/333
V2= 268.47cm