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Sloan [31]
3 years ago
12

Question 2

Chemistry
1 answer:
SVETLANKA909090 [29]3 years ago
3 0

D- Physical

Explanation:

A physical property is anything that has characteristics associated with a change in it's chemical composition

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Chemistry question, please help!
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Boyle’s Boyle’s law I believe is correct answer
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3 years ago
Which of the following statements about the Diels-Alder reaction are TRUE?
andreev551 [17]

Answer:

A.It is a reaction involving pi-electrons.

D.It is *not* a reaction favored by entropy considerations.

Explanation:

The Diels-Alder reaction is a [4+2]- cycloadition that involoves pi-electrons (4 from the diene and 2 from the dienophile).

The reaction is favored by the formation of new sigma bond, since they are more stable than pi-bonds. This reaction is not favored by entropy because there are 2 reactants and one product and the order increases.

The reaction happens in one step.

6 0
3 years ago
Suppose a snack bar is burned in a calorimeter and heats 2,000 g water by 20 °C. How much heat energy was released?
prohojiy [21]

Heat energy released : 167.2 kJ

<h3>Further explanation</h3>

Heat can be calculated using the formula:  

Q = mc∆T  

Q = heat, J  

m = mass, g  

c = specific heat, joules / g ° C  

∆T = temperature difference, ° C / K  

m = 2000 g

c = 4.18  J/ g ° C  

∆t = 20 ° C  

\tt Q=2000\times 4.18\times 20\\\\Q=167200~J=167.2~kJ

7 0
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To protect against a fire, copper used for wiring in a house would best be covered with
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Plastic or rubber as non metal are bad conductor of electricity.

4 0
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Read 2 more answers
Which statement describes the transfer of heat energy that occurs when an ice cube is added to an insulated container with 100 m
ICE Princess25 [194]
<span>The answer to this question would be: (3) The ice cube gains heat energy and the water loses heat energy.

Based on the law of conservation of energy, the energy in an isolated system should be constant. If something receives energy, other must be losing energy. The option 1 and 2  definitely false because the total energy is not constant.
In this case, the ice should have lower heat energy, so the ice should be the one who receives energy from the water</span>
4 0
3 years ago
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