Answer:
2.5 mol of C
7.5 mol of H
1.25 mol of O
Explanation:
Ethanol belong to class of organic compounds called as alcohols. It is known as one of the green solvent used in most of the organic reactions. It has a Molecular Formula;
C₂H₅OH or C₂H₆O
In above molecular formula there are two basic terms shown'
1) Symbols:
Symbols are the chemical notations representing the said element with one or two characters. In this case the C is symbol of Carbon atom, H is symbol of Hydrogen atom and O is symbol of Oxygen atom. hence, we can say that ethanol is made up of carbon, hydrogen and oxygen atoms.
2) Subscripts:
Subscripts are the numbers in chemical formula which are written below the normal line. In molecular formula they specifies the number of said elements. For example. in ethanol the 2 after C shows that there are two atoms of carbon, the 6 after H shows that there are 6 atoms of hydrogen and no subscript after O shows that there is one oxygen atom in this molecule.
Hence, we can conclude that each mole of Ethanol contains,
2 moles of Carbon
6 moles of Hydrogen
1 mole of Oxygen
Now,
As,
1 mole of C₂H₆O contained = 2 moles of C
So,
1.25 moles of C₂H₆O will contain = X moles of C
Solving for X,
X = 1.25 × 2 mol / 1 mol
X = 2.5 mol of C
Also,
As,
1 mole of C₂H₆O contained = 6 moles of H
So,
1.25 moles of C₂H₆O will contain = X moles of H
Solving for X,
X = 1.25 × 6 mol / 1 mol
X = 7.5 mol of H
And,
As,
1 mole of C₂H₆O contained = 1 moles of O
So,
1.25 moles of C₂H₆O will contain = X moles of O
Solving for X,
X = 1.25 × 1 mol / 1 mol
X = 1.25 mol of O
<span>This example represents the challenge of survival of the fittest. In this situation, the trees have a distinct advantage due to their above average height. This puts them in the best position to gain the resources that they need to survive, most notably, the sun. The smaller plants, however, do not have this advantage, and lose out to the trees.</span>
Answers:
Question 1) d. 4 moles
question 2) a. single displacement reaction
question 3) c. 2N2H4 + N2O4 ==>3N2+4H2O
question 4) a. 40 ml alcohol in 100 ml water
bonjours ma question est sin x=1/7 comment trouver les valeurs de x plz help my
Answer:
S = 1,75x10⁻⁴M
Explanation:
It is possible to answer this question using Henry's law that states that the amount of dissolved gas in a liquid is proportional to its partial pressure above the liquid. The formula is:
S = k×Pi
Where S is solubility, K is Henry's constant and Pi is partial pressure.
At sea level, Pi of O₂ is:
1atm×0,209 = 0,209 atm. Replacing:
2,67x10⁻⁴M = k×0,209atm
k = 1,28x10⁻³M/atm
At 12,000ft Pi of O₂ is:
0,657atm×0,209 = 0,137 atm. Replacing:
S = 1,28x10⁻³M/atm×0,137atm
<em>S = 1,75x10⁻⁴M</em>
<em />
I hope it helps!