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------------------------------------------------ How many moles are in 58 grams of NaCl if [tex]Na = 23[/tex] and [tex]Cl = 35.5[/tex]?

Sure! Let's solve this step-by-step.

To find out how many moles are in 58 grams of NaCl, we need to follow these steps:

1. Determine the molar masses of the elements:
- The molar mass (atomic weight) of sodium (Na) is 23 grams per mole.
- The molar mass (atomic weight) of chlorine (Cl) is 35.5 grams per mole.

2. Calculate the molar mass of NaCl:
- The formula for sodium chloride (NaCl) consists of one sodium (Na) atom and one chlorine (Cl) atom.
- Therefore, the molar mass of NaCl is:
[tex]\[ \text{Molar mass of NaCl} = \text{Molar mass of Na} + \text{Molar mass of Cl} \][/tex]
[tex]\[ \text{Molar mass of NaCl} = 23 \text{ grams/mole} + 35.5 \text{ grams/mole} \][/tex]
[tex]\[ \text{Molar mass of NaCl} = 58.5 \text{ grams/mole} \][/tex]

3. Calculate the number of moles:
- To find the number of moles, we divide the given mass of NaCl by its molar mass.
- Given mass of NaCl = 58 grams.
- Using the formula:
[tex]\[ \text{Number of moles} = \frac{\text{Given mass}}{\text{Molar mass}} \][/tex]
[tex]\[ \text{Number of moles} = \frac{58 \text{ grams}}{58.5 \text{ grams/mole}} \][/tex]
[tex]\[ \text{Number of moles} \approx 0.991 \][/tex]

So, there are approximately [tex]\(0.991\)[/tex] moles in 58 grams of NaCl.