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galben [10]
4 years ago
12

both slicing a tomato and a chemical change such as burning toast cannot be reversed however why is slicing a tomato still consi

dered only a physical change
Chemistry
2 answers:
Kamila [148]4 years ago
8 0

Both slicing a tomato and a chemical change such as burning toast cannot be reversed. Slicing a tomato still considered only a physical change because you are only altering the shape of the tomato by slicing. It does not change in color or produce bubbles when slicing.

OverLord2011 [107]4 years ago
5 0
Because the physical appearance change hope this helps
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2. Without energy there can be no
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At a particular temperature, the solubility of Kr in water is 0.060 M when the partial pressure is 0.90 atm. What partial pressu
elena55 [62]

At a particular temperature, the solubility of He in water is 0.060 M when the partial pressure is 0.90 atm. 2.27 atm is the partial pressure of Kr would give a solubility of 0.150 M.

<h3>What is Henry's Law ?</h3>
  • According to Henry's law, the weight of a gas dissolved by a liquid is proportional to the pressure of the gas onto the liquid.
  • With very few exceptions, a solute molecule in an extremely diluted solution will only have solvent molecules as its close neighbors. This means that the likelihood that a specific solute molecule will escape into the gas phase is predicted to be independent of the total concentration of solute molecules.

Solution:

The solubility of gas is directly proportional to partial pressure. It is expressed as:

S = K_ h \times P _g_a_s

where, S = Solubility of gas

K_h = Henry's Law constant

P_g_a_s = Partial pressure of gas

Now, put the values in above expression we get

0.060M = K_h × 0.9 atm

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Now we have to find the partial pressure of He

0.150 M = 0.066 M/atm × P_g_a_s

P_g_a_s = 2.27 atm

Learn more about the Henry's Law : brainly.com/question/23204201

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