In which situation would osmosis most likely occur in cells? Across a semi-permeable membrane that separates solutions of the same concentration
Across a semi-permeable membrane that separates solutions of the same concentration

Across a semi-permeable membrane that separates solutions of different concentrations
Across a semi-permeable membrane that separates solutions of different concentrations

Across a non-permeable membrane that separates solutions of the same concentration
Across a non-permeable membrane that separates solutions of the same concentration

across a non-permeable membrane that separates solutions of different concentrations
Across a non-permeable membrane that separates solutions of different concentrations

it would most likely occur

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Across a semi-permeable membrane that separates solutions of different concentrations

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this is because osmosis is the ‘net’ movement of molecules from a ‘region’ of ‘higher concentration’ to a ‘region’ of ‘lower concentration’ ‘down the concentration gradient’.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.