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ss7ja [257]
2 years ago
8

The density of a 13.2 mass solution of naf is

Chemistry
1 answer:
denis23 [38]2 years ago
0 0
The question, as presented, is incomplete. The entire question is shown below:

"<span>The density of a 13.2 mass % solution of NaF is 1.21 g/mL. Find the molarity of the solution."

We are asked to find the molarity of this solution, and molarity is defined as the amount of moles of a compound per unit volume, typically in units of mol/L.

The density of the NaF solution is 1.21 g/mL. Let's take a 1 L sample of this solution and determine the mass.

1.21 g/mL x 1000 mL = 1210 g of solution.

We are told that this solution is 13.2% NaF by mass. So the mass of NaF in this solution is:

1210 x 0.132 = 160 g NaF

We can then turn this mass of NaF into moles of NaF using the molecular weight of 42 g/mol.

160 g NaF / 42 g/mol = 3.80 moles NaF.

Now to convert this into molarity, we simply divide the amount of moles by the volume of sample, in this case 1L:

3.80 moles NaF/ 1L = 3.80 mol/L NaF or 3.80 M NaF.

The molarity is 3.80 M NaF.</span>
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4. Blue, Red, Green, Purple

(Lowest densities on the top, highest densities on the bottom)
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2 years ago
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Suppose a soap manufacturer starts with a triglyceride that has the fatty acid chains arachidic acid, palmitic acid and palmitic
DIA [1.3K]

Answer:

Sodium arachidate; Sodium palmitate and Sodium palmitate

Explanation:

Triglycerides are esters of fatty acids with glycerol. In triglycerides, three fatty acid molecules are linked by ester bonds to each of the three carbon atoms in a glycerol molecule. The fatty acids may be same or different fatty acid molecules. Hydrolysis of triglycerides yields the three fatty acid molecules and glycerol.

Saponification is the process by which a base is used to catalyst the hydrolysis of the ester bonds in glycerides. The products of this base-catalyzed hydrolysis of triglycerides are the metallic salts of the three fatty acids and glycerol. The salts of the fatty acids are known as soaps.

For a triglyceride that has the fatty acid chains arachidic acid, palmitic acid and palmitic acid attached to the three backbone carbons glycerol, the saponification of the triglyceride with NaOH will yield the sodium salts or soaps of the three fatty acids as well as glycerol.

Arachidic acid will react with NaOH to yield sodium arachidate.

The two palmitic acid molecules will each react with NaOH to yield sodium palmitate.

8 0
1 year ago
Write a two to four sentence conclusion statement explaining how the potential energy diagram is used to identify if the reactio
LenKa [72]

Answer:

Check Explanation

Explanation:

First Sentence

The Heat of a reaction is given as the heat content/heat of formation/enthalpies of the products minus the heat content/heat of formation/enthalpies of the reactants.

ΔH = H(products) - H(reactants)

Second Sentence

If the potential energy diagram has the product(s) having a higher potential energy than the reactant(s), then the reaction is an endothermic reaction (this is why the reaction absorbs heat from the surroundings to try to make up for the lack of potential energy of the reactants) and the sign on the enthalpy change is visibly positive since H(products) > H(reactants)

Third Sentence

If the potential energy diagram has the reactant(s) having a higher potential energy than the product(s), then the reaction is an exothermic reaction (this is why the reaction releases heat to the surroundings to try to take care of the higher potential energy of the reactants) and the sign on the enthalpy change is visibly negative since H(reactants) > H(products).

Hope this Helps!!!

8 0
2 years ago
Chlorine can bond with fluorine to form CIF. Chlorine can also bond with lithium to form LiCI Which compound will have a greater
Sergio [31]

Answer: ClF will have a greater partial charge.

Explanation:

A polar covalent bond is defined as the bond which is formed when there is a low difference of electronegativities between the atoms, thus resulting in charge difference. Example: ClF

Non-polar covalent bond is defined as the bond which is formed when there is no difference of electronegativities between the atoms and thus there is no charge difference. Example: F_2

Ionic bond is formed when there is complete transfer of electron from a highly electropositive metal to a highly electronegative non metal. The electronegative difference between the elements is high. The charges on cation and anion neutralise each other. Example: LiCl

Thus as ClF will have greater partial charge.

5 0
2 years ago
A graduated cylinder initially has 32.5 mL of water in it. After a 75.0 g piece of lead (Pb) is added to the graduated cylinder,
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Answer:

39.1-32.5 and you will find your answer it always like that, you subtract your starting point from your ending point

Explanation:

6 0
2 years ago
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