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Roman Golenok · Answer 1 · 2018-01-07T10:41:02+0000

Molar mass NH3 = 17.031 g/mol

1 mole NH3 ---------- 17.031 g
?? moles -------------- 1.2x10³ g

moles NH3 = 1 x ( 1.2x10³ ) / 17.031

moles NH3 = 1.2x10³ / 17.031

= 70.45 moles of NH3

hope this helps!

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