Answer:
See below
Step-by-step explanation:
Ammonium lauryl sulfate has the structural formula CH₃CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₂CH₂OSO₂O⁻ NH₄⁺.
The long nonpolar hydrocarbon chain and the ionic sulfate end group make it a surfactant.
The ionic end tends to dissolve in water, but the nonpolar chain does not. This makes the compound an excellent <em>foaming agent,</em> so it is used in many shampoos and toothpastes.
The molecules form <em>micelles</em> in water, small spherical shapes with the polar heads outside, facing the water, and the nonpolar tails are inside.
They reduce the surface tension or the water so that, when you brush your teeth or shampoo your hair, the air bubbles are stable and do not break.
Answer:
C.
Explanation:
This is a reaction of elimination, because the water was removed and because of it double bond is formed.
The mass of the piece of wood is 35.58 g.
Joule = M × T × C
Where, M = mass
T = change in temperature(42C-23C=19 C)
C = specific heat capacity = 1.716 joules/gram
Substituting the values in the equation,
1160 = M × 19 × 1.716
M = 1160/32.604 = 35.58 g
Therefore, the mass of the piece of wood = 35.58 g
<h3>What is meant by specific heat capacity?</h3>
A material's specific heat capacity, which is defined as its heat capacity divided by its mass, determines how much energy is required to increase a gram's temperature by one degree Celsius (or one Kelvin)
<h3>What is mass?</h3>
Mass is the quantity of matter in a physical body.
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<u>36 ml of NaOh and</u><u> 464 ml</u><u> of </u><u>HCOOH</u><u> would be enough to form 500 ml of a buffer with the same pH as the buffer made with </u><u>benzoic acid </u><u>and NaOH.</u>
What is benzoic acid found in?
- Some natural sources of benzoic acid include: Fruits: Apricots, prunes, berries, cranberries, peaches, kiwi, bananas, watermelon, pineapple, oranges.
- Spices: Cinnamon, cloves, allspice, cayenne pepper, mustard seeds, thyme, turmeric, coriander.
Calculate the amount of moles in NaOH and benzoic acid. This calculation is done by multiplying molarity by volume.
Amount of moles of NaOH -2 × 0.025 = 0.05 mol
Amount of moles of benzoic acid 2 × 0.475 = 0.095 mol
In this case, we can calculate the pH produced by the buffer of these two reagents, as follows
![pH = pKa + log\frac{base}{acid}](https://tex.z-dn.net/?f=pH%20%3D%20pKa%20%2B%20log%5Cfrac%7Bbase%7D%7Bacid%7D)
![4.2 + log\frac{0.05}{0.045} = 4.245](https://tex.z-dn.net/?f=4.2%20%2B%20log%5Cfrac%7B0.05%7D%7B0.045%7D%20%3D%204.245)
We must repeat this calculation, with the values shown for HCOOH and NaOH. In this case, we can calculate as follows
![pH = pKa + log\frac{base}{acid}](https://tex.z-dn.net/?f=pH%20%3D%20pKa%20%2B%20log%5Cfrac%7Bbase%7D%7Bacid%7D)
![4.245 = 3.75 + log\frac{base}{acid}](https://tex.z-dn.net/?f=4.245%20%3D%203.75%20%2B%20log%5Cfrac%7Bbase%7D%7Bacid%7D)
![log\frac{base}{acid} = 0.5](https://tex.z-dn.net/?f=log%5Cfrac%7Bbase%7D%7Bacid%7D%20%3D%200.5)
![\frac{base}{acid} = 3.162](https://tex.z-dn.net/?f=%5Cfrac%7Bbase%7D%7Bacid%7D%20%3D%203.162)
Now we must solve the equation above. This will be done using the following values
![\frac{2(0.5 - x)}{0.2x - 2(0.5 - x)} = 0.464 L](https://tex.z-dn.net/?f=%5Cfrac%7B2%280.5%20-%20x%29%7D%7B0.2x%20-%202%280.5%20-%20x%29%7D%20%3D%200.464%20L)
With these values, we can calculate the volumes of NaOH and HCOOH needed to make the buffer.
NaOH volume
( 0.5 - 0.464)L
0.036L .................... 36ml
HCOOH volume
500 - 36 = 464mL
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Answer:
An ion is a charged atom or molecule. It is charged because the number of electrons do not equal the number of protons in the atom or molecule. An atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.
Explanation:
hope it's right