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steposvetlana [31]
2 years ago
5

The Earth is ________________of years old

Biology
2 answers:
KatRina [158]2 years ago
7 0

Answer:

earth is tons of years old

Natali5045456 [20]2 years ago
6 0

Answer:

the earth is 4.543 billion years old

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Iron reacts with atmospheric oxygen to form iron oxide or ferric oxide. Look at the chemical equation for this reaction:
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Answer:

4 Fe + 3 O₂ → 2 Fe₂O₃

Explanation:

Let's start with the oxygen.

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What number do 2 and 3 have in common? 6.

Put a 3 in the reactants and a 2 in the products to balance the oxygen.

Fe + 3 O₂ → 2 Fe₂O₃

Now let's look at the iron.

Reactants - 1

Products - 4

Put a 4 in the reactants to balance the iron.

4 Fe + 3 O₂ → 2 Fe₂O₃

The equation is balanced. Hope that helps.

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