Which of the following does not release carbon back into the atmosphere?

klemol [59]

Hi,
The answer is HF since hydrogen bonds are can be formed only between Hydrogen and Fluorine, Oxygen or Nitrogen.

8 0

3 years ago

He then takes a powerful magnet and positions it below the table and the keys. He finds that he is able to drag the keys along t

Mamont248 [21]

C. magnetic forces act at a distance

Explanation:

Since he was able to drag the keys along the table by moving the magnet, it shows that magnetic forces acts a distance.

Magnetism is a property exhibited by a wide range of materials.

Around a bar magnet, there are field forces in which the forces of the magnets are felt.

Magnetic forces are non- contact forces. They don't need to be together to exert their force.
This is why magnetic forces act at a distance.

learn more:

Electromagnet brainly.com/question/2191993

#learnwithBrainly

7 0

3 years ago

Define density. Plz help me

FinnZ [79.3K]

Density is the weight of something per unit of volume

6 0

2 years ago

Meanings of Ka and pKa (a) Does a strong acid have a greater or lesser tendency to lose its proton than a weak acid? (b) Does th

Sunny_sXe [5.5K]

Answer:

(a) A strong acid has a greater tendency to lose its protons.

(b) A strong acid has a higher Ka than a weak acid.

(c) A strong acid has a lower pKa than a weak acid.

Explanation:

A strong acid has the ability to completely transfer their protons to the water, making a complete dissociation. Instead, a weak acid only dissociates partially, how much it dissociates depends on the acid dissociation constant (Ka).

The weak acids always are in equilibrium, and the equilibrium depends on the acid dissociation constant.

$HA + H_{2}O$ ⇄ $A^{-} + H_{3}O^{+}$

Thus, a stronger acid with a bigger Ka produces more dissociation and a higher concentration of protons.

The equation that defines pKa is:

$pKa = -Log (Ka)$

Therefore, a higher pKa means a lower Ka and also a weaker acid.

7 0

3 years ago

Consider the reaction represented by the equation?2SO2(g) + O2(g) 2SO3(g).?For the system at chemical equilibrium, which of the

rewona [7]

Answer:

b. The amount of SO3(g) decreases and the value for K increases.

Explanation:

Hello,

In this case, for the given reaction:

$2SO_2(g) + O_2(g)\rightleftharpoons 2SO_3(g)$

The change in the stoichiometric coefficient is:

$\Delta \nu=2-2-1=-1$

In such a way, since the reagents have more moles than the products, based on Le Chatelier's principle, if the volume is increased, the side with more moles is favored. In addition, since the formation of reagent is favored, K is diminished based on the law of mass action shown below:

$K=\frac{[SO_3]_{eq}^2}{[SO_2]_{eq}^2[O_2]_{eq}}$

Therefore the answer is:

b. The amount of SO3(g) decreases and the value for K increases.

Best regards.

3 0

3 years ago