Answer:
To determine how many grams of NaOH are produced from 120 grams of Na₂O, we need to first understand the chemical reaction that occurs when Na₂O is converted to NaOH. The reaction is as follows:
2 Na₂O + 2 H₂O → 2 NaOH + O₂
This reaction shows that for every 2 molecules of Na₂O that are converted to NaOH, 2 molecules of water are also produced.
Next, we need to determine the molar mass of Na₂O and NaOH. The molar mass of Na₂O is 61.98g/mol, and the molar mass of NaOH is 40.00g/mol.
Now we can use the molar masses to determine how many grams of NaOH are produced from 120 grams of Na₂O. First, we need to convert the mass of Na₂O from grams to moles by dividing by the molar mass:
120g Na₂O / 61.98g/mol = 1.94 mol Na₂O
Next, we need to multiply the number of moles of Na₂O by the conversion factor from the chemical reaction (2 mol NaOH / 2 mol Na₂O) to determine the number of moles of NaOH produced:
1.94 mol Na₂O * (2 mol NaOH / 2 mol Na₂O) = 1.94 mol NaOH
Finally, we can convert the number of moles of NaOH to grams by multiplying by the molar mass of NaOH:
1.94 mol NaOH * 40.00g/mol = 77.6g NaOH
Therefore, 120 grams of Na₂O will produce approximately 77.6 grams of NaOH.