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Answer:
4.25g
Explanation:
Molar concentration or molarity can be calculated thus;
Molarity (M) = number of moles (n) ÷ volume (V)
According to the provided information in this question, Volume = 5.0L, M = 0.050 M
number of moles = molarity × volume
n = 0.050 × 5
n = 0.25moles
Number of moles in a substance = mass (M) ÷ molar mass (MM)
Molar mass of ammonia (NH3) = 14 + 1(3)
= 17g/mol
Mass = moles × molar mass
Mass (g) = 0.25 × 17
Mass = 4.25g