1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Alenkasestr [34]
3 years ago
8

Provide a structure for the following compound: C9H10O3; IR: 2400–3200, 1700, 1630 cm–1; 1H NMR: δ 1.53 (3H, t, J = 8 Hz); δ 4.3

2 (2H, q, J = 8 Hz); δ 7.08, δ 8.13 (4H, pair of leaning doublets, J = 10 Hz); δ 10 (1H, broad, disappears with D2O shake)

Chemistry
1 answer:
Svet_ta [14]3 years ago
4 0

Answer:

The answer is Ethyl 3-hydroxybenzoate (structure attached).

Explanation:

The following can be elucidated from IR table of values:

2400- 3200 cm-1 ⇒ Carboxylic acid

17000 cm-1 ⇒ C=O bond (aldehyde, ketone)

1630 cm-1 ⇒ C=C (alkene) or aromatics

H NMR values:

1.53 ⇒ CH3 next to an electronegative, hence the high chemical shift (deshielded)

4.32⇒CH2 next to a CH3 and an R group (possible deshielding)

7.08, 8.13 ⇒ aromatics.

The structure is attached.

You might be interested in
28 ml of 0.10 m hcl is added to 60 ml of 0.10 m sr(oh)2. determine the concentration of oh− in the resulting solution.
Blababa [14]
Here is an acid-base reaction. Hydrochloric acid (HCl) reacts with strontium hydroxide [ Sr(OH)2 ]

Ions H+ and OH- neutralize each other. If the amounts are not equal, one of them will be in excess. 
Follow the steps as

1. Find moles of ions: mole= Molarity * Volume (in liter) ; n= M * V OR millimole = Molarity * Volume (in ml) ;
2. Write the equation
3. Find out excess ion
4. Use final volume (V acid + V base ) to calculate concentration of excess ion.

n HCI = 28 ml * 0.10 M = 0.28 mmol, releases 0.28 mmol H+ ions
n Sr(OH)2= 60 ml * 0.10 M= 0.60 mmol, releases 2* 0.60=1.20 mmol OH- ions
since Sr(OH)2⇒ Sr2+ + 2OH-

Neutralization reaction is OH- + H+ ---> H2O. The ratio is 1:1. That means 1 mmol hydroxide ions will neutralize 1 mmol hydrogen ions. Since OH- ions are greater in amount, they will be in excess

n(OH-) - n(H+)= 1.20 - 0.28 = 0.92 mmol OH- ions UNREACTED.

Total volume= V acid + V base= 28 ml + 60 ml = 98 ml

Molarity of OH- ions= mole / Vtotal = 0.92/98= 0.009 M

The answer is 0.009 M.


5 0
3 years ago
Read 2 more answers
You are carefully watching the temperature of your melting point apparatus as it is heating up. At 132 C it is still a white sol
Lisa [10]

Answer:

See the answer below

Explanation:

<em>Since the experiment is set out to determine the melting point of the white solid, after missing the melting point due to distraction, there are two possible solutions and both involves a repeat of the experiment.</em>

1. The first one is to allow the molten substance to solidify again and then repeat the experiment. This time around, a critical attention should be paid to be able to notice the melting point temperature once the temperature gets to 132 C.

2. The second solution would be discard the molten substance and repeat the experiment with the a new solid one. Similarly, critical attention should be paid once the temperature gets to 132 C since it is sure that the melting point lies within 132 and 138 C.

6 0
3 years ago
In a transverse wave that travels through a medium, the molecules of the medium vibratea. at twice the velocity of the molecules
viktelen [127]
B. at a right angle to the wave's direction
8 0
3 years ago
Question 2 of 19
Alborosie

Answer:

D

Explanation:

The temperature increases

3 0
3 years ago
The terms Q and K refer to reaction components at non-equilibrium and equilibrium conditions, respectively. For a forward reacti
daser333 [38]

Answer:

The value of Q must be less than that of K.

Explanation:

The difference of K and Q can be understood with the help of an example as follows

         A ⇄ B

In this reaction A is converted into B but after some A is converted , forward reaction stops At this point , let equilibrium concentration of B be [B] and let equilibrium concentration of A be [A]

In this case ratio of  [B] and  [A]  that is

K =  [B] / [A] which is called equilibrium constant.

But if we measure the concentration of A and B ,before equilibrium is reached , then the ratio of the concentration of A and B will be called Q. As reaction continues concentration of A increases and concentration of B decreases. Hence Q tends to be equal to K.

Q = [B] / [A] . It is clear that Q < K before equilibrium.

If Q < K , reaction will proceed towards equilibrium or forward reaction will

proceed .

8 0
3 years ago
Other questions:
  • A certain liquid has a density of 1.50 g ml. 2.00ml of this liquid would have a mass of
    5·1 answer
  • Which of the following is an anion?<br> A. O2- <br> B. Mg2+ <br> C. Al3+ <br> D. H
    10·1 answer
  • A farmer lost most of his crops last year because of insects. This year he decided to use pesticide to kill the insects. However
    5·1 answer
  • 1.As you move from left to right across a period,the number of valence electrons
    5·1 answer
  • 7.00×10−3 mol of HBrare dissolved in water to make 12.0 L of solution. What is the concentration of hydroxide ions, [OH-], in th
    7·2 answers
  • The coolant in automobiles is often a 50/50 % by volume mixture of ethylene glycol, C2H6O2, and water. At 20°C, the density of e
    15·1 answer
  • Which of this is not an effect of humans using a natural recourse?
    11·1 answer
  • I need help with this question ASAP
    8·1 answer
  • PLZ HELP ASAP
    8·1 answer
  • N:<br> Calculate the mass percent of each element in Na2S.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!