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seraphim [82]
4 years ago
6

How did Mendeleev organize the elements in the periodic table?

Chemistry
1 answer:
iren2701 [21]4 years ago
7 0

It is the LAST one in the options.

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Peter performed an experiment to test which of the three compounds his teacher gave him was an ionic compound. The table shows h
Irina18 [472]

Answer:B is an ionic compound

Explanation:This is because when we look at the properties of ionic compounds, we see that the form crystals just like salt(sodium chloride), they dissolve in water, have a high boiling and melting point, are hard due to the strong intermolecular forces between atoms and conduct electricity (only molten or in solution form)

5 0
4 years ago
Read 2 more answers
One liter of helium gas has a mass of 2.3 grams at STP. True or false
Katen [24]
<h3>answer:</h3>

true po

mark me if wrong

6 0
3 years ago
Convert 0.600 atm of pressure to its equivalent in millimeters of mercury. Express the pressure numerically in millimeters of me
skelet666 [1.2K]

Answer is 456 mmHg.


<em>Explanation;</em>


This is a simple unit conversion problem.


1 atm = 760 mmHg


Hence,

0.600 atm = (760 mmHg / 1 atm) x 0.600 atm

                 = 456 mmHg


Pressure can be measured by using many units such as atm, Pa, torr, bar, cmHg, mmHg and so on.


The relationships among those units as follows

1 atm = 101325 Pa = 1.01325 bar = 760 torr, 760 mmHg = 76 cmHg


8 0
3 years ago
Two technicians are discussing ASE certification. Technician A says that there are 60-plus exams each designed to discern the au
finlep [7]

Answer:

Technician B is correct.

Explanation:

ASE exams are in 9 categories and they're based on real things that would happen in service shops in real life.

4 0
3 years ago
Describe the bodys first line of defense
tatyana61 [14]

Answer:

The main function of the immune system is to provide immunity to the body. Immunity is the body's ability to protect itself from the pathogens it is exposed to. Immunity depends on the body's ability to differentiate between things that belong in the body and those that do not. The immune system's first line of defense includes physical and chemical barriers that are always ready and prepared to defend the body from infection.

The skin acts as a barrier against pathogens. Some structures of the first line of defense include the skin, mouth, eyes, ears, nose, and stomach. The skin produces sweat and oil that work together to keep pathogens from the entering the body. Saliva and tears contain substances the can destroy pathogens. The ears and the stomach help fight pathogens.The ears produce ear wax that prevent pathogens from entering the ears. The stomach produces a liquid the kills pathogens.

Mucus is produce by the nose, lungs, throat, and stomach. Mucus traps pathogens. Mucus also prevent pathogens from getting into deep tissues. Anyway, the very first line of defense against any invasion of the human body is a set of physical barriers between the inside of the body and the outer world.

*my notes from edge2020*

Hope this helps ^-^

5 0
3 years ago
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