Question

a) Number of moles in 85 g of ammonia (NH3).

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Answer 1

Answer:

Moles=Given mass/molar mass

Molar mass of Ammonia=NH3

N=14

H=1

Therefore,molar mass of Ammonia=14+1×3=17

Given mass=85

Therefore number of moles=85/17=5 moles

Answer 2

Answer:

5 moles

Explanation:

to find number of moles use this formula-

N= given mass/molar mass

we know the molar mass of NH3 = 17g/mol ,and given mass is 85

so applying the formula we get:

85/17= 5 moles

Hope It Helps You!