The observation that 15.0 g of hydrogen reacts with 120.0 g of oxygen to form 135.0 g of water is evidence for the law of:. a) energy conservation
b) mass conservation
c) definite proportions
d) multiple proportions

the answer is definitely c.

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms

listen, you cant how young you were.

"you didn't chose the stud life. the stud life chose you."