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andriy [413]
3 years ago
12

What is the number of molecule(s)?

Chemistry
2 answers:
Gemiola [76]3 years ago
5 0

1. 4NHCO3

2. 3CaCO3

3. 5NaC2H3O

4. 6NH3

5. 2CaCl2O2

ans ( a). NHCO3

Svet_ta [14]3 years ago
3 0
I think it’s 2 not sure I don’t remember this stuff
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Why are valence electrons important
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Explanation:

The electrons in the outermost shell of an atom are the valence electrons. These electrons are the most loosely held in an atom.

The energy required to remove these electrons are not as great as those of the inner shell electrons.

  • Atoms of some elements show no tendency to combine with other  atoms because they have completely filled outer energy levels.
  • Their outermost shell, valence shell and the electron numbers are complete for them. These are the noble gases.
  • other atoms share or exchange their valence electrons in order to have a stable configuration.
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Learn more:

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3 years ago
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Gnesinka [82]

Answer:

purple gatorade

Explanation:

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7 0
2 years ago
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oksano4ka [1.4K]

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Consider the combustion of carbon monoxide (CO) in
Julli [10]

Answer:

3.60 mol CO₂

Explanation:

Balanced chemical reaction:

2CO + O₂ ⇒ 2CO₂

The molar ratio between CO₂ and CO is 1:1

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Thus, the moles of CO₂ produced from 3.60 moles of CO is 3.60 moles:

(3.60 mol CO)(CO₂/CO) = 3.60 mol CO₂

6 0
3 years ago
Looking at the same nonmetal group on the periodic table, how does the reactivity of an element in period 2 compare to the react
N76 [4]

Answer:

The period 2 element would be more reactive because the attractive force of protons is stronger when electrons are attracted to a closer electron shell.

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Nonmetals want to add more electrons to their valence electron shell. Elements in period 2 have their valence shell closer their nucleus, then they are more reactive than period 4 elements.

6 0
3 years ago
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