Yes. But this is my idea, and you really should not do it. You can kill people, show that dead body to everybody, run away, then some guys will call police. that way you'll be famous. Your name and...
This might depend on
a) what is in the cans b) how accurate the scales are
If a can with liquid in it is left open overnight some moisture may be lost by evaporation - making it slightly lighter...
Just turn back the clock until you are 14 years old. Good luck!
Well, you are growing overnight. That is, if you haven't reached your fullest potential.