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Svetlanka [38]
3 years ago
6

A ping pong ball with a dent in it can be put into a pan of boiling water. After a short amount of time, the dent will pop out.

Explain why this occurs.
Chemistry
1 answer:
Sergeeva-Olga [200]3 years ago
8 0
Thermal expansion causes the gas particles inside the ping pong ball to spread apart, putting pressure on the dent and popping back out.
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what is the balanced equation for the reaction of solid magnesium metal with oxygen gas to produce solid magnesium oxide
GaryK [48]

Answer:

2Mg + O₂ ⟶ 2MgO

Explanation:

Step 1. Start with the most complicated-looking formula (O₂?).

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We have fixed 2 O on the left. We need 2O on the right. Put a 2 in front of MgO.

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We have fixed 2 Mg on the right-hand side. We need 2 Mg atoms on the left. Put a 2 in front of Mg.

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Every formula now has a coefficient. The equation should be balanced. Let’s check.

<u>Atom</u>  <u>On the left</u>  <u>On the righ</u>t

  Mg             2                  2

  O                2                  2

All atoms are balanced.

The balanced equation is

2Mg + O₂ ⟶ 2MgO

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