To determine how many grams are in 0.50 moles of sodium hydroxide (NaOH), we need to use the concept of molar mass. The molar mass of a substance is the mass of one mole of that substance. For sodium hydroxide, the molar mass is calculated as follows:
- Sodium (Na): 22.99 g/mol
- Oxygen (O): 16.00 g/mol
- Hydrogen (H): 1.01 g/mol
Adding these together, the molar mass of NaOH is:
22.99 g/mol (Na) + 16.00 g/mol (O) + 1.01 g/mol (H) = 40.00 g/mol
Now, to find the mass of 0.50 moles of NaOH, we multiply the number of moles by the molar mass:
0.50 moles × 40.00 g/mol = 20.00 grams
Therefore, there are 20.00 grams in 0.50 moles of sodium hydroxide.