To determine the mass of sodium in 100 grams of sodium oxide (Na2O), you need to consider the molar mass of sodium (Na) and sodium oxide (Na2O).
1. The molar mass of sodium (Na) is approximately 22.99 grams/mol.
2. The molar mass of sodium oxide (Na2O) is calculated by adding the molar masses of two sodium atoms (2 x 22.99 g/mol) and one oxygen atom (16.00 g/mol), which equals 2(22.99 g/mol) + 16.00 g/mol = 61.98 g/mol.
Now, we can calculate the mass of sodium in 100 grams of sodium oxide:
First, calculate the fraction of sodium in sodium oxide:
(2 x molar mass of sodium) / molar mass of sodium oxide
= (2 x 22.99 g/mol) / 61.98 g/mol
= 45.98 g/mol / 61.98 g/mol
= 0.741
Now, multiply this fraction by the mass of sodium oxide (100 grams) to find the mass of sodium:
0.741 x 100 grams = 74.1 grams
So, the mass of sodium in 100 grams of sodium oxide is approximately 74.1 grams.