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Naddika [18.5K]
3 years ago
6

HELP PLEASE ANSWER PLEASE ITS URGENT!! -unnecessary comments will be reported.

Chemistry
1 answer:
Verizon [17]3 years ago
8 0

Answer:

19. 1, 2, 3, 4, 5, 6, 7, 8

20. Li=1+, Be=2+, B=3+, C=4+

21. N=3-, O=2-, F=1-

Explanation:

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The reactants are oxygen and nitrogen monoxide.

<h3>What is nitrogen monoxide?</h3>

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8 0
1 year ago
Answer Quick
kow [346]

Answer:

20.9%

Explanation:

  • The percentage by mass of solution is given by dividing the mass of solute in grams by the mass of solution in grams then multiplying it by 100%.

% Mass of solution = mass of solute/mass of solution × 100%

                               = (27.0 g/ 129.0 g) × 100%

                               = 20.93%

                               = 20.9%

7 0
3 years ago
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A basketball weighs approximately 1.35 kg. What is this mass in grams (g)?<br><br> step by step
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Answer:

1350 g

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8 0
3 years ago
When sugar dissolves in water are covalent bonds broken?
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Explanation:

An exothermic reaction is a chemical reaction in which heat energy is evolved during the reaction process.

Bond formation requires energy while bond breakage releases energy. More energy is needed for the formation of weak bonds as compared to strong bonds.

<em>Hence, when weak bonds break, they release more energy than needed to make a corresponding strong bond leading to the release of the remaining energy as heat.</em>

6 0
3 years ago
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