Make the following conversions:

a. Convert [tex]0.599 \, \text{mol} \, \text{Na}_3\text{PO}_4[/tex] to grams.

Calculation:
[tex]\[
\text{Molar mass of } \text{Na}_3\text{PO}_4 = 69 + 31 + 64 = 164 \, \text{g/mol}
\][/tex]
[tex]\[
0.599 \, \text{mol} \times 164 \, \text{g/mol} = 98.2 \, \text{g}
\][/tex]

b. Convert 62.8 grams [tex]\text{Pb}\left(\text{NO}_3\right)_4[/tex] to moles.

Sure, let's go through the conversions step-by-step!

### a. Convert 0.599 mol of Na₃PO₄ to grams

1. Find the molar mass of Na₃PO₄:
- Sodium (Na): 3 atoms × 23 g/mol = 69 g/mol
- Phosphorus (P): 1 atom × 31 g/mol = 31 g/mol
- Oxygen (O): 4 atoms × 16 g/mol = 64 g/mol
- Total molar mass: 69 + 31 + 64 = 164 g/mol

2. Calculate the mass in grams:
- Given moles of Na₃PO₄ = 0.599 mol
- Mass = moles × molar mass
- Mass = 0.599 mol × 164 g/mol = 98.2 g

### b. Convert 62.8 grams of Pb(NO₃)₄ to moles

1. Find the molar mass of Pb(NO₃)₄:
- Lead (Pb): 1 atom × 207 g/mol = 207 g/mol
- Nitrogen (N): 4 atoms × 14 g/mol = 56 g/mol
- Oxygen (O): 12 atoms × 16 g/mol = 192 g/mol
- Total molar mass: 207 + 56 + 192 = 455 g/mol

2. Calculate the moles:
- Given mass of Pb(NO₃)₄ = 62.8 g
- Moles = mass / molar mass
- Moles = 62.8 g / 455 g/mol ≈ 0.138 mol

These calculations help convert between grams and moles using the substance's molar mass. If you need further clarification, feel free to ask!