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Lemur [1.5K]
3 years ago
6

Predict what will be observed in each experiment below. A student sees tiny bubbles clinging to the inside of an unopened plasti

c bottle full of carbonated soft drink. The student squeezes the bottle. A. The bubbles will shrink, and some may vanish. B. The bubbles will grow, and more may appear. C. The bubbles won't change. D. I need more information to predict what will happen to the bubbles.
Chemistry
2 answers:
Arisa [49]3 years ago
6 0

Answer:

A.

Explanation:

Squeezing the bottle creates negative pressure inside the bottle because of the plastic's elasticity that will hasten the extraction of the carbon dioxide from the soda.

geniusboy [140]3 years ago
5 0

Answer:

A

Explanation:

The bubbles are formed because the carbonic acid of the soft drink decomposes and forms carbon dioxide gas, which has low solubility in liquids. The decomposition reaction is a reversible reaction:

H₂CO₃(l) ⇄ CO₂(g) + H₂O

When the bottle is shaken, the molecules of the drink became more agitated, so the pressure of it will increase. The increase of pressure in a reversible reaction shifts the equilibrium of the formation of the less gas molecules (Lê Chatelier's Principle). So, the CO₂ will dissolve in liquid, and less bubbles will be seen.

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Seawater has a ph of 8.1. what is the concentration of oh–?
lara31 [8.8K]
PH scale is used to determine how acidic or basic a solution is.
pH can be calculated as follows;
by knowing the ph we can calculate pOH
pH + pOH = 14
pOH = 14 - 8.1 
pOH = 5.9 
pOH is used to calculate the hydroxide ion concentration 
pOH = -log[OH⁻]
[OH⁻] = antilog(-pOH)
[OH⁻] = 1.26 x 10⁻⁶ M
therefore hydroxide ion concentration is 1.26 x 10⁻⁶ M
4 0
3 years ago
What is true about resonance structures? Select the correct answer below: They are all different molecules. The interconvert wit
3241004551 [841]

Answer:

The correct answer is: <em>They each partially describe the bonding in a molecule.</em>

Explanation:

Some chemical molecules cannot be described completely by using only one Lewis structure. In these cases, we can describe the molecule by drawing 2 or more Lewis structures, and the structures are called <u>resonance structures</u>. The overall molecular structure is explained by all the resonance structures together. So, they each describe the bonding in the molecule only partially.

7 0
3 years ago
Determine the mass of 9.2 x 10^18 molecules of dinitrogen tetroxide.
steposvetlana [31]

Answer: 1.4x10-3 g N2O4

Explanation: First convert molecules of N2O4 to moles using Avogadro's Number. Then convert moles to mass using the molar mass of N2O4.

9.2x10^18 molecules N2O4 x 1 mole N2O4 / 6.022x10²³ molecules N2O4

= 1.53x10-5 moles N2O4

1.53x10-5 moles N2O4 x 92 g N2O4/ 1 mole N2O4

= 1.4x10-3 g N2O4

4 0
3 years ago
If most objects are made up of free space then why can we put our hands through a book or wall?
Mazyrski [523]
I suppose you mean to ask why we can't go through obstacles.

Any atom is surrounded by an electronic cloud. When two atoms get close to each other, the electronic clouds repel each other, preventing them from interpenetrating each other. That same phenomenon, on a larger scale, prevents us from going through matter.
4 0
3 years ago
Calculate the mass percent (m/m) of a solution prepared by dissolving 45.09 g of NaCl in 174.9 g of H2O.
inysia [295]

Answer:

20.3 %  NaCl

Explanation:

Given data:

Mass of solute = 45.09 g

Mass of solvent = 174.9 g

Mass percent of solution = ?

Solution:

Mass of solution = 45.09 g + 174.9 g

Mass of solution = 220 g

The solute in 220 g is 45.09 g

220 g = 2.22 × 45.09

In 100 g solution amount of solute:

45.09 g/2.22 = 20.3 g

Thus m/m% = 20.3 %  NaCl

5 0
3 years ago
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