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Drupady [299]
3 years ago
13

What is the advantage of having valves in the

Chemistry
1 answer:
fenix001 [56]3 years ago
6 0
The valves stop the blood from flowing backwards
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How does an atom become a positively charged ion
sladkih [1.3K]
When, it donates electons.

as for example take
NaCl ( sodium chloride)

it's an ionic compund,
that means it is formed by donating or gaining electrons

Na is writen first than, it must be electropositive i.e it has donated electons which made it positive and the clorine gains electron so it's electronegative.

Na is positive because
as we know it's atomic number is 11 that means it has 11 protons and 11 electrons
now, when it donate electon it has, greater number of protons whose change is +ve so the atom becomes overall positively charged ion or cation.

and something same happens in clorine and because it gains one electron and the number of electrons increase in it by 1 whise charge is -ve so, the atom becomes negatively charged ion or anion which has a -1 charge.
3 0
3 years ago
What kind of organic compound is propane
arsen [322]

Answer:

hydrocarbon

Explanation:

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2 years ago
What chemicals would be needed to create a mint that actually cleaned teeth while offering flavors and consumable chemicals? I'd
amid [387]

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ddddddddddddddddddddddddddddddddddddddddddddddddd

Explanation:

5 0
2 years ago
I need to show work on all my problems and I am not God in math
Salsk061 [2.6K]
That's cool man, you should study more... wheres the question though?
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3 years ago
Pls help.............
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C is the correct answer
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