The correct answer is 2. Magnetic fields must start at the north pole of a magnet and end at the south pole of a magnet. I took the test. Hope I helped!
Answer:
hot air rises because gases expand as they heat up.When air heats up and expands,its density also increases.The warmer,less dense air effectively floats on top of the colder, dense air below it. This creates a buoyant force that causes warmer air to rise.
cold air sinks because it is heavier as its more dense ( because of closely packed molecules) soits harder for them to move and they absorb less energy. Also, gravity pulls on it more strongly.
Hope it helps :)
Considering the definition of percent yield, the percent yield is 76%.
<h3>Percent yield</h3>
The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.
The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:

where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.
<h3>Percent yield in this case</h3>
In this case, you know:
- actual yield= 0.532 moles
- theorical yield= 0.700 moles
Replacing in the definition of percent yield:

Solving:
<u><em>percent yield= 76%</em></u>
Finally, the percent yield is 76%.
Learn more about percent yield:
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Answer:
The answer to this question is; <em>1.08 x 10^5</em>
Explanation:
This is the correct option because
600 x 180 = 108,000
108,000. -> move the decimal over 5 times to get a number between 1 and 10
1.08 x 10^5
Answer:
esters
Explanation:
The -OR group of the alcohol replaces the -OH of the carboxylic acid, forming an ester. See attachment for condensed mechanism.