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Likurg_2 [28]
4 years ago
12

HELP ME PLEASE HURRY

Chemistry
2 answers:
Sati [7]4 years ago
8 0
I belive the answer is b
MAVERICK [17]4 years ago
8 0

Answer: Option (A) is the correct answer.

Explanation:

A chemical reaction where heat energy is absorbed by the reactant molecules is known as an endothermic reaction.  

For example, A + B + Heat \rightarrow AB

The value of \Delta H = +ve for an endothermic reaction.

On the other hand, a chemical reaction in which heat energy is released by the reactant molecules is known as an exothermic reaction.  

For example, C + D \rightarrow CD + Heat is an exothermic reaction.

As 200 kJ of heat was taken in on average by the calorimeter so, it means heat energy is absorbed by the calorimeter.

Thus, we can conclude that the given reaction is endothermic in nature.

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The strong crystal structure of an ionic compound is one of the main reasons why ionic compounds have a __________ melting point
charle [14.2K]

Answer:

high

Explanation:

because of the strong crystal structure mentioned in the question, ionic compounds require a higher level of heat to melt

8 0
4 years ago
For the following reaction:
vlada-n [284]

Answer:

Nitrogen is the limiting reactant, and  

3.74

grams of ammonia is formed.

Explanation:

We have the familiar Haber process equation...

N

2

(

g

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+

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H

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(

g

)

⇌

2

N

H

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(

g

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Since the mole ratio of  

N

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to  

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1

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4 0
3 years ago
Mendeleev created this table as he noticed that a
Nimfa-mama [501]

Answer:

Mendeleev had left the noble gases out of his periodic table.

Explanation:

Mendeleev's periodic table is pictured in the image attached to the question.

Mendeleev's table obviously lacked the noble gases. The reason for this grave omission is simple; the noble gases were not known as at the time when he formulated his periodic table. There weren't any known elements  whose properties were similar to the  properties of the noble gases. This would have lead him to suspect their existence.

4 0
3 years ago
PLEASE HURRY !!!!
raketka [301]

Answer:

condensation reaction

Explanation:

In condensation reaction is a small molecule formed from the atoms removed from a single reactant molecule

4 0
3 years ago
Would the density of a person be the same on the earth and on the moon ? explain
rosijanka [135]

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No

Explanation:

The density of a person stays the same no matter where they are in the universe

6 0
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