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aleksandrvk [35]
3 years ago
11

Why do some chemical reactions occur?

Chemistry
1 answer:
zheka24 [161]3 years ago
7 0

Answer:

Explanation:

Reactions occur when two or more molecules interact and the molecules change. Bonds between atoms are broken and created to form new molecules

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Iron has a mass of 7.87 g per cubic centimeter of volume, and the mass of an iron atom is 9.27 × 10-26 kg. If you simplify and t
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<span>(a) what is the average volume (in cubic meters) required for each iron atom
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<span>
V = 9.27 x 10^-26 kg / </span>7.87g/cm<span>³ ( 1 kg / 1000 g)
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2 years ago
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Answer:

Please see the attachments

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3 years ago
Which of the following is the balanced equation for P + O2 → P2O5? Question 3 options: A) 4P + O2 → 2P2O B) P + 5O2 → 2P2O5 C) 4
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Given equation:

P + O2 → P2O5

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Reactants                                            Products

P = 1                                                       P = 2

O = 2                                                     O = 5

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Reactants                                            Products

P = 4                                                      P = 4

O = 10                                                    O = 10

Ans: D)


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3 years ago
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You always adjust numbers and it will be before the element
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Every plant cell has a nucleus because a nucleus controls the cell's main <span>activities.</span>
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