'alcohol'<span>The most commonly used and abused substance in terms of prevalence and recency of use.</span>
The compound contains an ester functional group.
An ester is a carbonyl (C=O) group with an alkyl (R) group on one side and an alkoxy (OR) group on the other.
We write the <em>condensed structural formula</em> of an ester as R(C=O)OR or RCOOR.
<span>C10H12N2O
First, lookup the atomic weights of C, H, N, and O
Atomic weight of Carbon = 12.0107
Atomic weight of Hydrogen = 1.00794
Atomic weight of Nitrogen = 14.0067
Atomic weight of Oxygen = 15.999
Now determine the ratio of atoms of each element by dividing their mass percentage by their atomic weights.
Carbon = 68.2 / 12.0107 = 5.67827
Hydrogen = 6.86 / 1.00794 = 6.805961
Nitrogen = 15.9 / 14.0067 = 1.135171
Oxygen = 9.08 / 15.999 = 0.567535
Now determine a simple integer ratio of small integers that closely approximates the ratio of relative molar amounts.
5.67827 : 6.805961 : 1.135171 : 0.567535
Going to first divide all values by 0.567535 (picked because it's the smallest in the above ratios) getting
10.005 : 11.992 : 2.000 : 1
These numbers are all extremely close to integers so it looks like the empirical formula for Serotonin is C10H12N2O
Let's compute the molar mass of the empirical formula
10 * 12.0107 + 12 * 1.00794 + 2 * 14.0067 + 15.999 = 176.2 g/mol
Since that calculated molar mass matches the desired target, we're done. If the calculated mass was smaller, or the desired mass was larger (like 352 g/mol) we would have multiplied the number of atoms by the appropriate factor. But that's not needed, so the molecular formula for Serotonin is C10H12N2O</span>
Answer:
80 ml
Explanation:
Moles to start = .04 L * .6 M/L = .024 moles
this is how much must be in the final dilution
.2 moles / liter * x liter = .024 moles
x = .024 / .2 = .12 liter final volume
start with . 040 then add .080 to get .12 liter
.080 liter = 80 ml
Answer:
propanoic acid forms hydrogen bonded dimers and 1-butanol does not.
Explanation:
Propanoic acids will have a higher boiling point because it forms dimers.
The two compounds have hydrogen bonds as their predominant intermolecular bonds. The intermolecular determines a lot about the physical properties of a substance such as it's viscosity, boiling point, melting point etc.
The two compounds have hydrogen bonds which are bonds that occur between between hydrogen and a more electronegative atom. The electronegative atoms are usually oxygen,nitrogen and fluorine.
In a compound of 1-butanol, we have just a single hydrogen bond between the hydrogen on one compound and the oxygen on the hydroxyl group of another one.
For, propanoic acids, dimerization occurs. Here, we have two hydrogen bonds. The alkanoic acid functional group furnishes the bond. This bond forms between the carbonyl group and hydrogen on a compound and the hydroxyl group and another hydrogen on the same compound.