Answer:
Concentration (C) = number of moles (n) / volume (v)
Therefore
number of moles (n) = concentration × volume
Concentration = 6.50M
Volume =0.175 L = 0.175dm³
n = 6.50 × 0.175
n = 1.138 moles
Moles of ammonia in the solution is
1.138 moles.
Hope this helps