13
Help lol please thanks

Mass = 15.13 g

Explanation:

Given data:

Number of atoms of hydrogen = 8.11×10²³

Mass of ammonia formed = ?

Solution:

Chemical equation:

3H₂ + N₂          →    2NH₃

Number of moles of hydrogen:

1 mole contain 6.022× 10²³ atoms

8.11×10²³ atoms × 1 mol / 6.022× 10²³ atoms

1.35 mol

Now we will compare the moles of hydrogen and ammonia:

            H₂        :         NH₃

             3         :           2

           1.35      :         2/3×1.35 = 0.89 mol

Mass of ammonia:

Mass = number of moles × molar mass

Mass = 0.89 mol × 17 g/mol

Mass = 15.13 g

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

i'm wiling to try and you : )