Nitrogen and hydrogen make ammonia. If you begin with 36.2g of nitrogen and excess hydrogen, how many grams of ammonia can you make?

Mass =  44.2 g  

Explanation:

Given data:

Mass of nitrogen reacted = 36.2 g

Mass of ammonia formed =?

Solution:

Chemical equation:

N₂ + 3H₂    →    2NH₃

Number of moles of nitrogen:

Number of moles = mass/molar mass

Number of moles = 36.2 g / 28 g/mol

Number of moles = 1.3 mol

Now we will compare the moles of nitrogen and ammonia from balanced chemical equation to determine how many moles of ammonia re formed.

                        N₂         :         NH₃

                        1            :          2

                       1.3          :         2/1×1.3 = 2.6 mol

Mass of ammonia:

Mass = number of moles × molar mass

Mass = 2.6 mol × 17 g/mol

Mass =  44.2 g  

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.