What is the average Mw for a fatty acid mixture whose fats (1 gram) required 0.0034 equivalents of NaOH to titrate. Remember: 1 Fatty acid has 1 equivalent.
1. Ew = Mw (#H+)
2. Ew = mass/eq
a.) 294.12 g/mol
b.) 145.04 g/mol
c.) 345.56 g/mol
d.) 132.04 g/mol

Answers

Answer 1

Answer:

a.) 294.12 g/mol

Explanation:

1 equivalent of fatty acid reacts with 1 equivalent of NaOH.

As in the titration are required 0.0034 equivalents of NaOH, the equivalents of fatty acids = moles of fatty acids are:

0.0034 moles of fatty acids

Molar mass is defined as the ratio between mass of substance in a determined amount of moles. The mass of the fats was 1 gram, that means the molar mass is:

1g / 0.0034moles =

294.12g/mol

Right option is:

a.) 294.12 g/mol


Related Questions

Suggest a possible mechanism for the acid catalyzed reaction of a typical ketohexose to give 5-hydroxymethylfurfural.

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Answer:

See explanation

Explanation:

Taking the acid catalysed hydrolysis of fructose C6H12O6, the mechanism begins with the protonation of an -OH group as shown.

This is now followed by dehydration and formation of a keto-enol tautomer. The keto form is now dehydrated followed by the protonation of a second -OH group.

A second dehydration followed by deprotonation leads to the formation of  5-hydroxymethylfurfural.

Image credit: SciElo

which two changes of state can be caused by removing thermal energy from a substace A. deposition B. condencation C. vaporization D.sublimation

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Answer:

maybe is b but wait to other people answer

Answer:A. deposition B. condencation

Explanation:

Humans have 50 pairs of chromosomes true or false

Answers

Answer:

False

Explanation:

humans have 23 pairs

HELP ASAPPPP BRAINLIEST

Answers

Answer:

2nd option

Explanation:

The observed cell potential for a voltaic cell is 2.067 V when the temperature is 298 K and the concentration of copper(ll) ions is 1.07 M. What is the concentration of aluminum ions in this cell?
Al(s)|A13+ (aq, ?M)||Cu2+(aq, 1.07M)|Cu(s)
Cu2+(aq) + 2 e- → Cu(s) 0.337 V
Al3+(aq) + 3 e- → Al(s) -1.66 V

Answers

Answer:

3.22  * 10^-4 M

Explanation:

The cell reaction equation is;

2Al(s) + 3Cu^2+(aq) ------> 2Al^3+(aq) + 3Cu(s)

E° = 0.337 V - (-1.66 V)

E° = 1.997 V

Given that the cell potential is 2.067 V, from Nernst's equation;

E = E° - 0.0592/n log Q

Substituting values;

2.067 = 1.997 - 0.0592/6 log [Al^3+]^2/[1.07]^3

0.07 = - 0.0592/6 log [Al^3+]^2/[1.07]^3

- 7.07 = log [Al^3+]^2/[1.07]^3

Antilog (- 7.07) =  [Al^3+]^2/[1.07] ^3

8.5 * 10^-8 =  [Al^3+]^2/[1.07]^3

[Al^3+]^2 = 8.5 * 10^8  * 1.07 ^3

[Al^3+]^2 = 1.04 * 10^-7

[Al^3+] = √1.04 * 10^-7

[Al^3+] = 3.22  * 10^-4 M

This item is used for small cuts and peeling.
1-Chef Knife
2-Pizza Cutter
3-Kitchen Shears/Scissors
4-Paring Knife

Answers

I would say #3 I’m sorry if it’s wrong tho

Help! I dont know how to do this lol

Answers

the order is :

- Aufbau principle

- Hund's Rule

- Pauli's Exclusion Principle

Need help with this please thanks

Answers

Answer: 1. [tex]2H_2+O_2\rightarrow 2H_2O[/tex]

2. [tex]P_4+3O_2\rightarrow 2P_2O_3[/tex]

3. [tex]N_2+3H_2\rightarrow 2NH_3[/tex]

4. [tex]2K+Cl_2\rightarrow 2KCl[/tex]

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The given equations are balanced as:

1. [tex]2H_2+O_2\rightarrow 2H_2O[/tex]

2. [tex]P_4+3O_2\rightarrow 2P_2O_3[/tex]

3. [tex]N_2+3H_2\rightarrow 2NH_3[/tex]

4. [tex]2K+Cl_2\rightarrow 2KCl[/tex]

Which of the atoms below are least likely to violate the octet rule?

Answers

Answer:

F i think i pretty sure F!!!!!!!!

The third law of thermodynamics states that:_____.
a. the entropy of the universe equals the sum of the entropy of system and that of the surroundings.
b. the entropy of the universe is constant.
c. the entropy is zero at 0 K for a perfect crystal.
d. the entropy of the universe is increasing.
e. the absolute entropy of a substance decreases with increasing temperature.

Answers

Answer:

C

Explanation:

The third law of thermodynamics states that at absolute zero temperature, the entropy of a perfect crystal is zero. In other words, as the temperature of a system approaches zero, the entropy also approaches a constant value.

The law only holds true only if the crystal has minimal energy and only exist in one state. The entropy becomes zero as the temperature also becomes zero only for a perfect crystal. Otherwise, the law refuses to hold.

The correct option is, therefore, C.

Why are a molecule's atoms as far away from each other as they can get?
A) Electronegativity differences force the atoms apart
B) The protons in the nuclei push the atoms apart
C) Forces between electron pairs push the atoms apart
D) Induced dipoles push the atoms away from each other

Answers

Answer:

the answer is a

Explanation:

an electron contains a negative charge and like charges repel each other. Hence, in a atom the force of repulsion between the atoms away from each other. As a result a molecules atoms are as far away from each others as they can get .

A molecule's atoms as far away from each other as they can get because "Forces between electron pairs push the atoms apart".

So, option C is correct one.

Why electrons repel each other?

Since, an electron is negative charge species revolve around the nucleus of an atom. So, when two atoms come close to each other in molecules there is repulsion occurs between negative charge electron .

To learn more about electrons here.

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Why is a “spark” of energy required to begin the chemical reaction of burning a fossil fuel? What is another name for this spark of energy?

Answers

Answer: a burst

Explanation: a burst of energy could be substatuded for spark of energy

A spark of energy is required to begin the chemical reaction of burning a fossil fuel because; This spark of energy is required to attain the activation energy of the reaction.

Another name for this spark of energy is Ignition.

Definition:

The activation energy of a chemical reaction is the minimum amount of energy required for the commencement of the chemical reaction.

In this case, the spark of energy is required to attain the activation energy of the reaction.

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Can someone answer 5 for me please?

Answers

Answer:

D

Explanation:

D

As the number of bonds increases, the strength of the bond ________.

Answers

Answer:

increases

Explanation:

Pro
∆G0=-RT in k Known as​

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Answer:

Gibbs free energy equation

Explanation:

I need hlep with this question ​

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Im pretty sure its increases/decreases but then again theres also increases/increases but go with the first one i think its that one im so sorry if it’s wrong

Answer:

yes its what the other person said

Explanation:

Which statements correctly compare the masses of protons neutrons and electrons

Answers

Protons and neutrons have similar mass. Electrons are smaller than a proton or a neutron. An atomic scientist was studying an atom and through experimentation found that the total negative charge of the area surrounding the nucleus is -9.

Please help with the chart

Answers

Answer:

no

Explanation:

Can someone help me and explain why they got what they got?

Answers

Answer:

24.32 amu

Explanation:

From the question given above, the following data were obtained:

Isotope A (Mg–24):

Mass of A = 24 amu

Abundance (A%) = 79%

Isotope B (Mg–25):

Mass of B = 25 amu

Abundance (B%) = 10%

Isotope C (Mg–26):

Mass of C = 26 amu

Abundance (C%) = 11%

Average atomic mass of Mg =?

Average atomic mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]

= [(24 × 79)/100] + [(25 × 10)/100] + [(26 × 11)/100]

= 18.96 + 2.5 + 2.86

= 24.32 amu

Thus, the average atomic mass of Mg is 24.32 amu

In an industrial process ethanol C2H60 burns with O2 to produce heat. Each mole of ethanol produces 8842 joules during the reaction.
C2H5OH (1) + 3 O2(g) 2 CO2(g) + 3 H2O(0) + 8842 Joules
How many Kilojoules are obtained from burning 982.6 g of ethanol?

Answers

Answer:

[tex]189kJ[/tex]

Explanation:

Hello!

In this case, since one mole of ethanol release 8,842 J per 1 mole of ethanol, we can write:

[tex]\frac{8,842J}{1molC_2H_6H}[/tex]

Thus, since we need the energy released by 982.6 g of ethanol, we compute the moles in such mass of fuel:

[tex]n=982.6g\frac{1mol}{46.08g} =21.3mol[/tex]

Therefore, the result is:

[tex]\frac{8,842J}{1mol}*21.3mol=188,545J[/tex]

Which in kJ is:

[tex]189kJ[/tex]

Best regards!

True or False: Cohesion is the attraction between particles of the same
substance

Answers

Answer: True

Explanation:

Which graph shows the pressure-volume relationship expected for an ideal gas? (This is an illustration of Boyle's law.)
Question 11 options:

A)

Graph B

B)

Graph C

C)

Graph D

D)

Graph A

Answers

Answer:

D

Explanation:

The graph of Boyle's law is known as pressure-volume graph or PV curve. It is as follows:

As observed from the graph above, pressure increases with a decrease in volume, and vice versa. Thus, pressure is inversely proportional to volume. Other parameters (temperature and amount of gas) are constant in the graph above.

Volume is on the x-axis and pressure, on the y-axis. The equation of the curve is PV = k, which is the equation of Boyle's law. The curve is hyperbolic in nature having two asymptotes: P = 0 (horizontal) and V = 0 (vertical).

As volume tends to positive infinity, pressure tends to zero, and we get the horizontal asymptote, P = 0.

Horizontal asymptote, P=0

When volume approaches zero, pressure approaches infinity, and it results in the vertical asymptote, V = 0.

The graph which shows the pressure-volume relationship expected for an ideal gas is: C)  Graph D.

Boyle's states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.

Mathematically, Boyle's law is given by the formula:

[tex]PV = k[/tex]

Where;

P is the pressure of an ideal gas.V is the volume of an ideal gas.

For the illustration of Boyle's law using a graph, volume is represented on the x-axis while pressure is represented on the y-axis.

Generally, the graph of Boyle's law is a hyperbolic curve with two asymptotes:

P = 0 (horizontal axis).V = 0 (vertical axis).

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Who were the two groups of Suffragists, and how were their tactics to gain a woman’s right to vote different?

Answers

Answer:The national woman suffrage association and American woman suffrage association.

Explanation: The party eventually realized that it needed to escalate its pressure in more aggressive tactics, like picketing the White House over many months, leading to the arrest and imprisonment of many suffragists. Using a variety of tactics, the party successfully pressured the president, members of congress, and state legislators to support of the 19th amendment to the U.S constitution guaranteeing woman nationwide the right to vote.

Weeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

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Weeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

The reaction between calcium carbonate (CaCO3) and HCl produces calcium chloride (CaCl2), carbon dioxide (CO2), and water (H2O).What happens when the concentration of hydrogen chloride (HCl) molecules is doubled in this reaction?

CaCO3 + 2HCl → CaCl2 + CO2 + H2O

Answers

Answer:

yes that is right

Explanation:

Answer: what is the answer im on plato

Explanation:

what is the volume of 18.9 g of a liquid that has a density of 0.956 g/ml

Answers

The volume is 19.76987448 by taking the known variables mass=18.9g and density=0.956g/ml
To get volume you divide the mass by the density which gives you about
19.77 ml in volume

a gas occupies 600.0 ml at 20.00 degrees C and 70.00kPa what will be the pressure at 40.00 degrees C and 150.0mL?

Answers

Answer:

P₂ = 299.11 KPa

Explanation:

Given data:

Initial volume = 600 mL

Initial pressure = 70.00 KPa

Initial temperature = 20 °C (20 +273 = 293 K)

Final temperature = 40°C (40+273 = 313 K)

Final volume = 150.0 mL

Final pressure = ?

Formula:  

P₁V₁/T₁ = P₂V₂/T₂  

P₁ = Initial pressure

V₁ = Initial volume

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Solution:

P₂ = P₁V₁ T₂/ T₁ V₂  

P₂ =  70 KPa × 600 mL × 313 K / 293K ×150 mL  

P₂ = 13146000 KPa .mL. K /43950 K.mL

P₂ = 299.11 KPa

The image seen here is caused by events __________ Earth's surface.
A) above
B) at
C) on
D) under

Answers

Answer:

Above

Explanation:

It’s a turnado
C) on earth surface

Because a tornado touches down on earth surface

What are capacitors used for

Answers

its a basic storage device used to store electrical charges and release it as it is required by the circuit. they are also used as smoothing, filtering and bypassing

What is the final pressure of 1.00 mol of ammonia gas, initially at 1.00 atm, if the volume is:___________.
a. gradually decreased from 78.0 mL to 39.0 mL at constant temperature.
1) 2.00 atm
2) 1.00 atm
3) 0.50 atm
4) Not enough data
b. increased from 43.5 mL to 65.5 mL at constant temperature.
c. decreased by 40% at constant temperature.

Answers

Answer:

The correct answer is a = 2 atm, b = 0.66 atm, and c = 1.66 atm.

Explanation:

a. When the temperature is constant, the ideal gas equation, that is, PV = nRT becomes PV = constant, or P1V1 = P2V2

Based on the given information, the pressure of the gas is 1.00 atm, the V1 of the gas is 78 ml, and the V2 of the gas is 39 ml.  

Now using the above formula we get,  

P2 = (P1V1) / (V2)

P2 = 1 atm * 78 ml/39 ml

P2 = 2 atm.  

b) Now the volume V1 is 43.5 ml, and the volume V2 is 65.5 ml at constant temperature, P1 is 1 atm. Now P2 will be,  

P2 = (P1V1) / (V2)

P2 = 1 atm * 43.5 ml/65.5 ml

P2 = 0.66 atm

c) In the given case, when the volume is decreased by 40 percent, let us consider that the volume, V1 be 100 ml, and the volume V2 be 60 ml, the P1 is 1 atm, now the P2 will be,  

P2 = (P1V1) / (V2)

P2 = 1 atm * 100 ml/60 ml

P2 = 1.66 atm.

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