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2 years ago

Of these four liquids, which is the most viscous?

Chemistry

2 answers:

erma4kov [3.2K]2 years ago

8 0

Answer: Option (d) is the correct answer.

Explanation:

Viscosity is defined as the ability of a fluid to resist its flow. That is, more thicker a fluid is less likely it is able to flow with ease.

For example, viscosity of honey is high as compared to water.

Whereas water at room temperature, ethyl alcohol at room temperature, and hot motor oil can flow easily.

Thus, we can conclude that out of the given options, honey at room temperature is the most viscous.

Iteru [2.4K]2 years ago

6 0

I believe the correct answer from the choices listed above is the last option. <span>Of these four liquids, the most viscous one is honey at room temperature. Honey is made up of sugars and the hydrogen of the sugars and water is what makes it more viscous.</span>

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Question 2 Calculate the pH of a solution that has an acetic acid concentration of 0.05 M and a sodium acetate concentration of

Eva8 [605]

Answer : The pH of the solution is, 4.9

Explanation : Given,

Dissociation constant for acetic acid = $K_a=1.8\times 10^{-5}$

Concentration of acetic acid = 0.05 M

Concentration of sodium acetate = 0.075 M

First we have to calculate the value of $pK_a$ .

The expression used for the calculation of $pK_a$ is,

$pK_a=-\log (K_a)$

Now put the value of $K_a$ in this expression, we get:

$pK_a=-\log (1.8\times 10^{-5})$

$pK_a=5-\log (1.8)$

$pK_a=4.7$

Now we have to calculate the pH of buffer.

Using Henderson Hesselbach equation :

$pH=pK_a+\log \frac{[Salt]}{[Acid]}$

$pH=pK_a+\log \frac{[CH_3COONa]}{[CH_3COOH]}$

Now put all the given values in this expression, we get:

$pH=4.7+\log (\frac{0.075}{0.05})$

$pH=4.9$

Therefore, the pH of the solution is 4.9.

8 0

2 years ago

What is the 10% rule? What is its significance? Why is energy lost?

TEA [102]

The 10% rule means that approximately there will be only 10% energy transferred from a trophic level into another. That was because the consumer on the upper level will use the energy before it was consumed. About 90% of the energy used so only 10% remain will be transferred.
Example: an antler eating grass with a total 100 calories. Then the antler is moving and growing, using 90 calories. Then a lion eats the antler, but the energy remains is only 10 calorie because 90 calories are already used.

4 0

3 years ago

A chlorine atom in its ground state has a total of seven electrons in orbitals related to the atoms third energy level. how many

kiruha [24]

<span>5 electrons

</span>The electron configuration of an atom shows or describes the distribution of electrons in their atomic orbitals. In particular, it shows the distribution in terms of the principal energy levels or electron shells (reflected by the numbers 1, 2, 3, 4, 5, 6, 7) and their corresponding subshells (reflected by the letters s,p,d,f,g) composed of atomic orbitals.

The maximum number of electrons in the s-subshell is 2, in the p-subshell, 6, in the d-subshell, 10, in the f-subshell, 14, and in the g-subshell, 18. In the electron configuration of an atom, the number of electrons in the subshell for a given atom is reflected by a number (in superscript) next to the corresponding letter of the subshell.

<span>The electron configuration of a chlorine atom in its ground state is
</span> $1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}$

Thus, the number of electrons in the 3rd energy level in the p-subshell is 5 ( $3p^{5}$ as seen in the electron configuration of the atom).

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2 years ago

ICl has a higher boiling point than Br2. What is the best explanation for this?

Flura [38]

<span>The best answer is B. ICl experiences induced dipole-induced dipole interactions. Both iodine and chlorine belongs to the same group of the periodic table. Electronegativity decreases as you go down a group therefore Cl will have a greater attraction with the bond it forms with another atom. Dipole-dipole interactions form between I and Cl. For the Br2 molecule, no dipole occurs because they are two identical atoms. Therefore we will be expecting ICl will have a higher boiling point due to higher binding energy it forms.</span>

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3 years ago

How can you tell S-wave arrival from the end of the P-wave?

Margarita [4]

Answer:

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2 years ago