Heat energy can be calculated by using the
specific heat of a substance multiplying it to the mass of the sample and the
change in temperature. It is expressed as:
<span>Energy = mCΔT</span>
<span>Energy = 100 (0.90) (150 - 30)</span>
Energy = 10800 J
Answer: Option (b) is the correct answer.
Explanation:
A statement which states a scientifically acceptable general principle that is experimentally tested or verified is defined as a theory.
A theory is the sum of a number of observations which are tested in order to get the true result so that a statement can be framed.
Thus, we can conclude that out of the given options, a theory is a well-tested explanation for a broad set of observations.
Any polar substances because water is polar and like dissolves in like
It’s should be the second one
Answer:
<em>C. The electron-withdrawing fluorine atoms pull electron density from the oxygen in trifluoroacetate. The negative charge is more stabilized in trifluoroacetate by this effect.</em>
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Explanation:
<em>The structures of trifluoroacetate and acetic acid are both shown in the image attached.</em>
<em>The trifluoroacetate anion (CF3CO2-), just like the acetate anion has in the middle, two oxygen atoms.</em>
<em>However, in the trifluoroacetate anion, there are also three electronegative fluorine atoms attached to the nearby carbon atom attached to the carbonyl, and these pull some electron density through the sigma bonding network away from the oxygen atoms, thereby spreading out the negative charge further. This effect, called the "inductive effect" stabilizes the anion formed,the trifouoroacetate anion is thus more stabilized than the acetate anion.</em>
<em>Hence, trifluoroacetic acid is a stronger acid than acetic acid, having a pKa of -0.18.</em>
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<u><em>Hope this helps!</em></u>
<u><em>Please mark brainliest!</em></u>
