MediumChemistryHigh School (9–10)GeneralAtoms and Molecules › Laws of Chemical CombinationNumericalBoard Exam
Nitrogen and hydrogen join in the ratio 14 : 3 by mass to make ammonia…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Nitrogen and hydrogen join in the ratio by mass to make ammonia. How much hydrogen is needed to join completely with of nitrogen? What mass of ammonia is made?
Need a reminder? The key ideaShow
A compound always has its elements in the same ratio by mass: water , carbon dioxide , ammonia , magnesium oxide . To share a mass in a ratio, add the parts first. Any extra of one element is left over.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Hydrogen. .
Step 2. Ammonia. .
Answer: of hydrogen, making of ammonia.
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