None, if your dumb
90
I really don't know much, but some that i know is carbon monoxide, oxgen and carbon dioxide Sorry for net knowing much ;;
ahh brain cramp >:(
Oxygen is a non metal element. Atomic mass of it is 16.
50
ten percent
You will become disorientated, confused and will eventually lose consciousness.
%75
10%
They were the same size.
If you mean "How much percentage of water does a human brain have?", the answer is about 77-78%.
Same as you, 100%.
it is 80% not 90%
20%
This compound is the trioxygen diarsenic oxide (As2O3), containing 75,7442 % As and 24,2558 % oxygen.
We yawn because when we breath through our mouths it brings in more oxygen than when we breath in through our noses. ( which is what most people do.) Sometimes, our brain doesn't think that its getting enough oxgen so it makes you yawn. Try yawning now - feel how much oxgen comes into your mouth? That's why.
about 10%