EasyChemistryHigh School (9–10)GeneralAtoms and Molecules › Laws of Chemical CombinationNumericalBoard Exam
Water has hydrogen and oxygen in the ratio 1 : 8 by mass…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Water has hydrogen and oxygen in the ratio by mass. How much hydrogen and how much oxygen are there in of water?
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. One part. .
Step 2. Hydrogen. part: .
Step 3. Oxygen. parts: .
Answer: of hydrogen and of oxygen.
Check. .
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