OronD
OronD Answered:

1.3M means 1.3 moles of NH3 in 1 liiter.
As you have only 1/5 litter of that sollution you have 1.3/5 or 0.26 moles of NH3. 
1 mole of NH3 weights roughly 17 g"r (14 + 3*1)
yous have only 0.26 moles so it will weight 17*0.26 = 4.42 g"r of NH3 at that solution 

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John McCann
John McCann

4.4 grams. Significant figures.
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