Question

what is the mass of 4.789 moles of sodium chloride

Answer 1

To calculate the mass of sodium chloride (NaCl) in grams when you have 4.789 moles, you'll need to use the molar mass of sodium chloride.

1. **Calculate the molar mass of NaCl:**
- Sodium (Na) has an atomic mass of approximately 22.99 g/mol.
- Chlorine (Cl) has an atomic mass of approximately 35.45 g/mol.

\[
\text{Molar mass of NaCl} = \text{Mass of Na} + \text{Mass of Cl} = 22.99\, \text{g/mol} + 35.45\, \text{g/mol} \approx 58.44\, \text{g/mol}
\]

2. **Use the molar mass to find the mass of 4.789 moles of NaCl:**

\[
\text{Mass} = \text{Number of moles} \times \text{Molar mass} = 4.789\, \text{moles} \times 58.44\, \text{g/mol}
\]

\[
\text{Mass} \approx 279.38\, \text{grams}
\]

Thus, the mass of 4.789 moles of sodium chloride is approximately **279.38 grams**.