CONNEXUS alternate test?
A student claims that mass is not conserved in chemical reactions and uses a reaction in which they measure the mass of liquid alcohol then light it on fire, measuring the mass of the liquid (water) remaining in the dish after the fire burns out. The mass of the liquid after the reaction is less than the mass of the alcohol before the reaction. Is this valid evidence of the student's claim? Why or why not?*
-Yes, it supports the claim because the masses were not the same and were measured carefully
-No, it does not support the claim because it is not a closed system.
-Yes, it supports the claim because the student completed an experiment to prove their
claim.
-No, there was not a chemical reaction.
1 answer
No, it does not support the claim because it is not a closed system
1 answer