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Gre4nikov [31]
3 years ago
11

Which of the following does NOT involve a physical change?

Chemistry
1 answer:
levacccp [35]3 years ago
3 0

Answer:

Degradation of matter

Explanation:

Physical change is a temporary change.

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what happens to the radius of the atoms of an element as you go towards the right in a row of the periodic table ?
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It decreases

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Functional group and bond hybridization of vanillin
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See attached figure for the structure.

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2) phenolic hydroxide group: R-OH, were the hydroxyl group is bounded to a carbon from the benzene ring

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The carbon atoms involved in the benzene ring and the red carbon atom (from the aldehyde group) have a <u>sp²</u> hybridization because they are involved in double bonds.

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7 0
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Will the calculated Molarity of NaOH be too high or too low or unaffected if the following happen: when you answer the question,
vodomira [7]

Answer:

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The result will be affected.

The mass of KHP  weighed out was used to calculate the moles of KHP weighed out (moles = mass/molar mass).

Not all the sample is actually KHP if the KHP is a little moist, so when mass was used to determine the moles of KHP, a higher number of moles than what is actually present would be obtained (because some of that mass was not KHP but it was assumed to be so. Therefore, there is actually a less present number of moles than the certain number that was thought of.

During the titration, NaOH reacts in a 1:1 ratio with KHP. So it was determined that there was the same number of moles of NaOH was the volume used as there were KHP in the mass that was weighed out. Since there was an overestimation in the moles of KHP, then there also would be an overestimation in the number of moles of NaOH.

Thus, NaOH will appear at a higher concentration than it actually is.

7 0
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