. Mkay ! So, one molecule of nitrogen reacting w/3 molecules of hydrogen makes 2 of ammonia. How many molecules of nitrogen must react w/42 molecules of hydrogen to make 28,of ammonia?

This doesn't look like math.

2 nitro react with 3 hydro to make 2 ammo

ratio: 2 : 3 : 2

we want : x : 42 : 28

2(14) : 3(14) : 2(14)

so x = 28
28 molecules of nitrogen are needed

check:
ratio of 28:42:28
= 2:3:2

Or use chemistry.

42 H2 x (1 mol N2/3 mol H2) = 42 x 1/3 = 14.
Check the NH3 production.
42 H2 x (2 mol NH3/3 mol H2) = 42 x 2/3 = 28.

OMG YOU HYPOCRITE DO THE HOMEWORK YOURSELF

To find the number of molecules of nitrogen that must react with 42 molecules of hydrogen to make 28 molecules of ammonia, we need to use the given ratio of the reaction.

The given ratio states that 1 molecule of nitrogen reacts with 3 molecules of hydrogen to produce 2 molecules of ammonia.

Let's break down the problem and find a solution step by step:

1. Determine the ratio of hydrogen to ammonia:
- For every 3 molecules of hydrogen, we get 2 molecules of ammonia.

2. Calculate the ratio of hydrogen to nitrogen:
- Since the reaction of nitrogen to hydrogen is 1:3, the ratio of hydrogen to nitrogen is the inverse, which is 3:1.

3. Use the ratio to calculate the number of nitrogen molecules:
- If the ratio of hydrogen to nitrogen is 3:1, then for every 3 molecules of hydrogen, we need 1 molecule of nitrogen.
- In this case, we have 42 molecules of hydrogen, so we divide it by 3 to find the number of nitrogen molecules:
42 molecules H2 / 3 = 14 molecules N2

Therefore, 14 molecules of nitrogen must react with 42 molecules of hydrogen to produce 28 molecules of ammonia.