Question

How many molecules (not moles) of NH3 are produced from 1.77×10−4 g of H2?

Answer 1

@Photon336

Answer 2

@Preetha

Answer 3

6.25x10^18 molecules but it isn't right

Answer 4

Have you been given an equation with this question?

Answer 5

no, are we suppose to use pv=nrt?

Answer 6

I'm taking a stab at what the chemical equation might be

N2 + 3 H2 ---> 2 NH3 ?

Answer 7

it's a bit unclear with the info given though

Answer 8

Well that is what's given. So I was suppose to balance the equation and now what do I need to do?

Answer 9

@Photon336

Answer 10

1. convert the g of H2 to moles of H2
1.77×10−4 g of H2 x 1 mol H2/ 2 g H2 = xxx mole H2

2. by the stoichiometry of the reaction you see 2 mol NH3 / 3 mol H2

xxx mole H2 x 2 mol NH3 / 3 mol H2 = yyyy mole NH3

3 convert mol of NH3 to molecles of NH3

yyyy mole of NH3 x 6.02 x 10^23 molecules of NH3/ 1 mol NH3 = zzzz molecules of NH3

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in one equation with 3 conversion factors:

1.77 x 10-4 g x (2 molH2/2gH2) x (2molNH3 /3 mol H2) x ( 6.02x10^23 molec NH3/ 1 molNH3) = zzz molec of NH3