Answer: 456.3g
Explanation:
Mass in grams = ?
Number of moles = 7.8 moles
Molar mass of NaCl = ?
For molar mass of NaCl, use atomic mass of sodium Na, = 23; Chlorine Cl = 35.5
NaCl = (23 + 35.5) = 58.5g/mol
Apply the formula:
Number of moles = (Mass in grams / molar mass)
7.8 moles = Mass /58.5g/mol
Mass = 7.8 moles x 58.5 g/mol
Mass = 456.3g
Thus, there are 456.3g in 7.8 moles of NaCl.
