 The compound ammonia is composed of two elements, nitrogen and hydrogen, and has a ratio of the mass of nitrogen divided by the mass of hydrogen that equals 4.7. So decomposition of the compound ammonia produces 5.1 grams of hydrogen. What's the mass of nitrogen that's produced? So in order to do this problem, we have to remember that it tells us the mass ratio that we want to use is the mass of nitrogen divided by the mass of hydrogen. So if we rearrange that equation, we should have everything we need to find that mass of nitrogen. So let's go ahead and do that. So the mass of nitrogen is going to equal the mass ratio times the mass of hydrogen. So the mass ratio in this problem is 4.7. We're going to multiply that 5.1 grams. Okay, so remember your units of grams here. So if we use the calculator here, what we can see is 4.7 times 5.1. And we're supposed to write that to 26624 grams of nitrogen. Okay, so that's going to be the mass of nitrogen using the law of constant composition. So keep this in mind when you're doing these types of problems. Okay, thank you. Any questions?