Answer:
0.371mol
Explanation:
The number of moles of a compound, denoted by n, can be calculated by dividing its mass in grams (g) by its molecular mass in grams per mol (g/mol).
Mathematically; n = mass of compound/ molar mass
According to the question, a mixture contains 21.7 g NaCl,
3.74 g KCI, and 9.76 g LiCl. In order to calculate the number of moles of NaCl in the mixture, we only need to use the mass NaCl compound occupies in the total mixture, which is 21.7g.
The molar mass of NaCl has been given as 58.44g/mol.
Hence, using the formula, we have;
Number of moles (n) = 21.7g / 58.54g/mol
n = 0.3713210
Approximately, n = 0.371mol
Therefore, 0.371mol of NaCl are present in the mixture.
