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Amiraneli [1.4K]
3 years ago
11

How do you know if a reaction is endothermic?

Chemistry
2 answers:
Bess [88]3 years ago
6 0
If the temperature becomes colder
Anastaziya [24]3 years ago
3 0
If the product side has a larger enthalpy the reaction is endothermic
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How many molecules are 4.3 x 10^27 molecules of N2O5<br>​
horrorfan [7]

Answer:

<h2>7142.86 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{4.3 \times  {10}^{27} }{6.02 \times  {10}^{23} }  \\  = 7142.857...

We have the final answer as

<h3>7142.86 moles</h3>

Hope this helps you

6 0
3 years ago
An opaque substance transmits light.<br><br><br> True or False
amm1812

Answer:

false

Explanation:

because light can't come through a dark surface

8 0
3 years ago
Which statement best describes a typical difference that could be found between the "Analysis" and "Conclusion" sections of a
IgorC [24]

The statement “Only the “Conclusion” section discusses whether the original hypothesis was supported, and both sections suggest further  research”, best describes the difference between analysis and conclusion.

Answer: Option 4

<u>Explanation: </u>

In research, we do experiments and derive the results. Then, those results were analyzed by us. In this analysis part, we compare our results with the related results published elsewhere. Also, we correlate the similarities and point out the differences between our analysis and other reported results.

In conclusion part, we have to check hypothesis or it supported. And, we summarise our analysis and figure out the further research need to be done on that to improvise our research. So, the final statement is the correct option which best describes the difference between analysis and conclusion.

3 0
3 years ago
A solution at 25 degrees Celsius has a pH of 4.48. What is the pOH of this solution?
murzikaleks [220]

Answer:

The answer is C = 9.52

Explanation:

I took the test

6 0
3 years ago
Read 2 more answers
Plate Tectonics Lab Report
madreJ [45]

Answer:

In this section, please include the if/then statements you developed during your lab activity for each location on the map. These statements reflect your predicted outcomes for the experiment.

<u>Location One: Select two events that you predict will be observed. If I explore two continental plates at a convergent boundary, then I will observe: </u>

earthquakes

faults

ocean formation

mountains

volcanoes

island chains

seafloor spreading

<u>Location Two: Select three events that you predict will be observed. If I explore two continental plates at a divergent boundary, then I will observe: </u>

earthquakes

faults

ocean formation

mountains

volcanoes

island chains

seafloor spreading

<u>Location Three: Select three events that you predict will be observed. If I explore two continental plates at a transform boundary, then I will observe: </u>

earthquakes

faults

ocean formation

mountains

volcanoes

island chains

seafloor spreading

<em><u>This is all I have for now! Hope this can help! :)</u></em>

3 0
3 years ago
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