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What does the 4 mean in the formula [tex]$4 Na_2SO_3$[/tex]?

A. There are four atoms of sodium.
B. There are four atoms of sodium sulfite.
C. There are four molecules of sodium sulfite.
D. There are four elements in sodium sulfite.

Sagot :

GinnyAnswer
The 4 in the formula [tex]\( 4 \, \text{Na}_2\text{SO}_3 \)[/tex] refers to the number of molecules of sodium sulfite. Let's break down the details:

The chemical formula [tex]\( \text{Na}_2\text{SO}_3 \)[/tex] represents one molecule of sodium sulfite. Within this molecule, we have:

- [tex]\( 2 \)[/tex] Sodium ([tex]\( \text{Na} \)[/tex]) atoms
- [tex]\( 1 \)[/tex] Sulfur ([tex]\( \text{S} \)[/tex]) atom
- [tex]\( 3 \)[/tex] Oxygen ([tex]\( \text{O} \)[/tex]) atoms

When there is a coefficient (like the number 4 here) in front of a chemical formula, it indicates the number of molecules of that compound. Therefore:

- [tex]\( 4 \, \text{Na}_2\text{SO}_3 \)[/tex] means four molecules of sodium sulfite.

To elaborate further:
- Each molecule of [tex]\( \text{Na}_2\text{SO}_3 \)[/tex] contains [tex]\( 2 \text{Na} \)[/tex], [tex]\( 1 \text{S} \)[/tex], and [tex]\( 3 \text{O} \)[/tex] atoms.
- The coefficient 4 means that you have four sets of these atoms.

Therefore, the correct interpretation of the 4 in the given formula is:

- There are four molecules of sodium sulfite.
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