Which statement is true about the electrons in each polar bond of a water molecule?
they are more attracted by the oxygen atom than by the hydrogen atom.
they are more attracted by the hydrogen atom than by the oxygen atom.
they are equally attracted by the hydrogen and oxygen atoms.
they are equally repelled by the hydrogen and oxygen atoms.
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Ответ:
They are more attracted by the oxygen atom than by the hydrogen atom.
Explanation:
Ответ:
The correct answer is option B, that is, the color change shows this is a chemical change because adding the gas caused the unexpected color change.
The bromothymol blue refers to a pH indicator that is used to determine the concentration of carbon dioxide in a solution. It changes its color to green in the existence of carbon dioxide gas. It is present in solid form and can be deprotonated or protonated that produces variations in color, that is, either green or yellow.
The modification in the color of indicator suggests the chemical change as all this is taking place in the existence of carbon dioxide gas.