like a molecule of sugar contain c6 h12 o6
Answers (1)
It depends on the type of sugar. Different sugars have different formulae and sometimes different sugars have the same formulae. However, because you gave a specific formula, we should be able to work it out for the formula.
The 24 atoms of your sugar molecule are six carbon, six oxygen and twelve hydrogen. You could say the hydrogen and oxygen are six water molecules. Your two teaspoons of sugar (10 grammes) are now 1/4 carbon and 3/4 water.
As a rough guide using atomic weight (which ignores the negligable weight of electrons), carbon atoms have six nucleons, oxygen eight, and hydrogen one. So carbon is six and water ten. By weight then, 10 grammes of sugar are 3.75g carbon and 6.25g water. You could convert that water into constituent gases but it won't really have a weight then.
Absolutely. Weight is such an arbitrary concept anyway, as we tend to think things weightless when really they're just lighter than the average weight of the atmosphere (which is a bit ridiculous as we wouldn't say a film of oil on a pool of water is weightless oil). Weight itself is also location-specific as it's proportional to local gravity. Strictly, I should also have talked about the weight of the constituents in Newtons as opposed to grammes (which is more a measure of mass) and I probably shouldn't have talked about weight at all but instead mass.
It was just one of those occasions where it was easier to oversimplify to get an answer that makes some sense than it was to be exacting (I dumped electron mass out of the equation and also talked about atomic numbers rather than atomic mass). Bothers me a bit that I did it without thinking, though. I used to think about it and determine whether to accept approximation. In this case, I can't say I considered it much.
Small picky point, although gases can be weightless as their molecular energy/velocity is faster than the other gases that surround them (hydrogen can blast around @ 25000 mph, the escape velocity of eaths gravity! ) still have mass of course.
Apologies if off subject!