Question

How many molecules of NH3 will be produced if I use 10g of H2?

Answer 1

20.05 ×10²³ molecules

Step-by-step explanation:

Given data:

Mass of hydrogen = 10 g

Number of molecules of ammonia = ?

Solution:

Chemical equation:

3H₂ + N₂ → 2NH₃

Number of moles of hydrogen:

Number of moles = mass / molar mass

Number of moles = 10 g / 2 g/mol

Number of moles = 5 mol

now we will compare the moles of hydrogen and ammonia.

H₂ : NH₃

3 : 2

5 : 2/3×5 = 3.33 mol

Number of molecules of ammonia:

1 mole contain 6.022 ×10²³ molecules

3.33 mol × 6.022 ×10²³ molecules / 1 mol

20.05 ×10²³ molecules