How many moles are in 120g of NH3

Moles of NH₃ : = 7.059

Given

120 g NH₃

Required

moles NH₃

Solution

The mole is the number of particles contained in a substance

1 mol = 6.02.10²³

Moles can also be determined from the amount of substance mass and its molar mass

Mol = mass : Molar mass

So for 120 g (molar mass of NH₃ = 17 g/mol) :

= 120 g : 17 g/mol

= 7.059

your answer is c) plasma

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