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beks73 [17]
3 years ago
12

Which of the following is not a chemistry topic?

Chemistry
2 answers:
Tju [1.3M]3 years ago
6 0
I’m pretty sure it’s D
stiks02 [169]3 years ago
3 0
Well anything linked to the ocean is biology, its the study of life. but in this situation chemistry is the study of mostly the chemical formulas so i would say D.
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PLEASE HELP WILL GIVE BRAINLYIST TO FIRST PERSON
kolezko [41]

Answer:

1) Weak base.

2) Weak acid.

Explanation:

<em>1) Which would have a lower pH, a 0.1 M solution of a strong base or a weak base? Why?</em>

  • For bases:

Solution with lower pH means that the solution has a lower basic character.

While solution with higher pH means that the solution has a higher basic character.

When we have a 0.1 M solution of a strong base or a weak base, the weak base will have a lower pH because it is not completely dissociated to produce OH⁻ ions.

While, strong base dissociates completely to produce OH⁻ ions, so it will has higher basic character and thus has a higher pH value.

So, weak base will have the lower pH value.

<em>2) Which would have a higher pH, a 0.1 M solution of a strong acid, or a weak acid? Why?</em>

<em></em>

  • For Acids:

Solution with lower pH means that the solution has a higher acidic character.

While solution with higher pH means that the solution has a lower acidic character.

When we have a 0.1 M solution of a strong acid or a weak acid, the weak acid will have a higher pH because it is not completely dissociated to produce H⁺ ions, so it has a lower acidic character.

While, strong acid dissociates completely to produce H⁺ ions, so it will has higher acidic character and thus has a lower pH value.

So, weak acid will have the higher pH value.

5 0
2 years ago
A tank containing both hf and hbr gases developed a leak. The ratio of the rate of effusion of hf to the rate of effusion of hbr
Pavlova-9 [17]

Answer:

2.01

Explanation:

The effusion is the passage of the molecules by a small hole by a difference of pressure. By Graham's Law, the rate of the effusion is inversely proportional to the square of the molar mass of the compound. Thus,

rateHF/rateHBr = √MHBr /√MHF

MHBr = 81 g/mol

MHF = 20 g/mol

rateHF/rateHBr = √81/√20

rateHF/rateHBr = 2.01

4 0
3 years ago
Which of the following elements are most likely to form an ionic bond
rodikova [14]

Answer:

<u>K (Potassium) and Cl (Chlorine)</u>

Explanation:

Ionic bonds are formed with metals and nonmetals

Covalent bonds are formed only with nonmetals

Calcium and potassium are both metals

Sulfur and Chlorine are both nonmetals so they don't form ionic bonds

Carbon and Oxygen are both nonmetals so they don't form ionic bonds

6 0
2 years ago
The temperature of a 10g sample of iron was raised by 25.4ᵒC with the addition of 114 J
Sidana [21]

Answer:

28956J

Explanation:

Specific heat capacity is equal to mass × heat capacity × temperature change

Shc = mCtheta

= 10 × 114 ×25.4

= 28956J

5 0
2 years ago
Nicotine is an addictive substance found in tobacco. Identify the hybridization state and geometry of each of the nitrogen atoms
Marina CMI [18]

The structure of nicotine is as follows:

In the aromatic ring, nitrogen atom has two bonds and one lone pair therefore, hybridization will be sp^{2}. In five-membered ring , nitrogen has two bonds and 1 lone pair therefore, hybridization will be sp^{3}.

Therefore, hybridization state of N^{1} and N^{2} (as in the attached structure) is sp^{2} and sp^{3} respectively.

Now, according to VESPR theory for sp^{2} hybridization with one lone pair the geometry is bent and for sp^{3} hybridization with one lone pair the geometry is pyramidal.

Therefore, geometry of N^{1} and N^{2} (as in the attached structure) is bent and pyramidal respectively.

3 0
3 years ago
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