CH3COOCH3
We have 2 atoms of oxygen - 2*M(O)=2*16.0=32.0 g/mol
Molar mass (CH3COOCH3)= 3*M(C)+2*M(O)+6*M(H)=3*12.0+2*16.0+6*1.0=
= 74.0 g/mol
% oxygen=(32.0 g/mol)/( 74.0 g/mol) *100% ≈ 43.2%
Answer:
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- <u><em>2)NH</em></u><em><u>₃</u></em>
Explanation:
The answer choices of this question are:
<h2 /><h2>Solution</h2>
The key to answer this question is to realize that <em>NH₃</em> is a gas at the given temperatures.
The solutilibty of all gases always decreases when the temperature increases. Thus, the solubility of NH₃ will decrease when the temperature rises from 10ºC to 50ºC.
The reason for this behavior of gases is that the temperature and the kinetic energy of the particles are directly proportional. Thus, as the temperature incrases the kinetic energy of the particles increases.
As the kinetic energy of the molecules of gas in the liquid solution increases, their speeds also increase, meaning that more molecules will escape from the solution to the gas phase, leaving the soluton with less dissolved gas molecules.
Convection
Explanation:
Convection is form of heat transfer by which heat moves through liquid and circulates due to density differences.
There are three major forms of heat transfer:
- Conduction is form of heat transfer that involves contact between two bodies in which collision between their molecules caused heat exchange from the hot body to the cold one.
- Radiation is a form of heat transfer that does not involve contact. It involves the use of electromagnetic waves of different forms.
- Convection occurs in fluids in which heat transfers as a result of movement of molecules of the medium from one point to the other. The hotter body becomes lighter and rises whereas the colder ones sinks.
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The number of moles of carbon atoms that are in 0.45 moles of C3H6O is 1.35 moles
step by step explanation
Find the total number of carbon atom in C3H6O
that is 1 x 3 = 3 atoms
0.45 moles is for one atom
what about 3 atoms
by cross multiplication
3 x0.45 = 1.35 moles
