Please help me with this chem question it’s due by midnight. I know the answer choice isn’t C.

Which functional group is found in methyl ethanoate?

Ulleksa [173]

Answer:

A central carbon is double bonded to O above, and single bonded to R below left and to O R prime below right.

Explanation:

Methyl ethanoate belongs to a homologous series in organic chemistry known as esters. A homologous series simply means a family of organic compounds. They always have the the same functional group and differ from each other by -CH2-functional group. The functional group is responsible for the chemical reactivity of the members of a particular homologous series.

The general formula for esters is RCOOR. Note that R and R may be the same or different. Hence, we have a central carbon atom, double bonded to an oxygen atom and also single bonded to R and OR respectively.

4 0

4 years ago

Read 2 more answers

List 3 complex carbohydrates (1pt x 3)

OLga [1]

Answer:

1. Starch

2. Cellulose (vegetable fibers)

3. Glycogen

Explanation:

Carbohydrates: They are bio-organic molecules synthesized by plants. these molecules are mainly made up of carbon, hydrogen and oxygen and consists of 1 to many sugar unit.

Sugar unit: C₆H₁₂O₆

on the basis of their unit and structural complexity there are three types of carbohydrates

1. Sugars:

These carbohydrates are composed of 1 to 2 units of glucose and these sugars have simple in structure and digestible and easily absorbed in blood.

2. Oligosaccharides:

These carbohydrates are composed of 3 to 9 units of glucose and these are the simplest polysaccharides are simple in structure and easily can be hydrolysed and digestible upon hydrolyzation easily absorbed in blood.

3. Polysaccarides:

These carbohydrates are composed of more than 9 units of glucose and these are complex in structures. These polysaccharides are of long chain and high wight and some of these can be hydrolysed and digestible upon hydrolyzation, but some can not be broken into simple sugar by hydrolyzation and can not be digested.

Now we have to explain about Complex Carbohydrates

1. Plant-derived digestible carbohydrate:

Plant synthesize carbohydrates and they stored in the form of oligosaccharides and polysaccarides that are of long chain and complex structure. Among these complex carbohydrates starch are digestible.

2. Plant-derived indigestible carbohydrate

Plant synthesize carbohydrates and they stored in the form of oligosaccharides and polysaccarides that are of long chain and complex structure. Among these complex carbohydrates cellulose (vegetable fibers) are insoluble and can not be digestive.

3. Animal-derived carbohydrate

Animals store the simple sugar in the form of glycogen. These glycogen are long chains of glucose and can be re-used by the body in need of energy

4 0

4 years ago

Consider 0.10 M solutions of acetic acid, ammonia, hydrochloric acid, and sodium hydroxide. Rank these solutions in order of inc

Zinaida [17]

Answer:

HCl < CH₃COOH < NH₃ < NaOH

Explanation:

Given compounds:

Acetic acid: CH₃COOH

Ammonia; NH₃

Hydrochloric acid: HCl

Sodium hydroxide: NaOH

All the solutions are of the same molarity which is 0.1M. We need to see how these compounds dissociate to form solutions in order to establish their pH value:

For Acetic acid;

CH₃COOH + H₂O ⇄ H₃O⁺ + CH₃COO⁻

Acetic acid is a weak acid and it ionizes slightly in solutions. It would have a pH close to 7

For Ammonia;

NH₃ + H₂O ⇄ NH₄⁺ + OH⁻

Ammonia is a weak base and it ionizes slightly in solutions. It sets up an equilibrium in the process. It's would be slightly above 7

For HCl:

HCl + H₂O → H₃O⁺ + Cl⁻

HCl is a strong acid and ionizes completely in solutions. It has a very low pH

For NaOH:

NaOH → Na⁺ + OH⁻

NaOH ionizes also completely in solutions and it breaks down into sodium and hydroxide ions. It is a strong base and it would have a high PH value.

HCl < CH₃COOH < NH₃ < NaOH

This is the trend of increasing pH

8 0

3 years ago

PLEASE HELPP!!!!

Natasha_Volkova [10]

Answer:

The combined law is:

$\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}$

See the derivation below.

Explanation:

1. Boyle's law:

$PV=constant\\\\P_1V_1=P_2V_2$

2. Charles' law:

$\dfrac{V}{T}=constant\\\\\\\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}$

3. Gay-Lussac’s law

$\dfrac{P}{T}=constant\\\\\\\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}$

4. Summary:

PV = K

V/T = K'

P/T = K''

Mulitply PV by V/T and P/T

$PV\times \dfrac{V}{T}\times \dfrac{P}{T}=K\times K'\times K''\\\\\\\dfrac{P^2V^2}{T^2}=constant\\\\\\\sqrt{\dfrac{P^2V^2}{T^2}}=\sqrt{constant}\\\\\\\dfrac{PV}{T}=constant$

Thus:

$\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}$

Which is the combined law.

4 0

4 years ago

Explain what a convection current is? who ever sees this I hope you have a wonderful day!

Alika [10]

Answer:

Convection currents are flowing fluid that is moving because there is a temperature or density difference within the material.

Because particles within a solid are fixed in place, convection currents are seen only in gases and liquids. A temperature difference leads to an energy transfer from an area of higher energy to one of lower energy.

3 0

3 years ago