How do the products and reactants of a chemical change compare?

The mass of the products is greater than the mass of the reactants because energy is taken in by the reaction.
The mass of the products equals the mass of the reactants because the same matter is present.
The mass of the products equals the mass of the reactants because there is no energy involved in the reaction.
The mass of the products is less than the mass of the reactants because energy is given off by the reaction.

Question

How do the products and reactants of a chemical change compare?
 	
	The mass of the products is greater than the mass of the reactants because energy is taken in by the reaction.
	The mass of the products equals the mass of the reactants because the same matter is present.
	The mass of the products equals the mass of the reactants because there is no energy involved in the reaction.
	The mass of the products is less than the mass of the reactants because energy is given off by the reaction.

anonymous · Answer

@HelpBlahBlahBlah @nothingwasthesame @JFraser @BloomLocke367 @conner143 @Dustinself42 @slinley @BlossomCake @HappySprout @jeffyblood

jfraser · Answer

conservation of mass is a law, one of the most important laws in all of chemistry

anonymous · Answer

so the mass wouldn't change

anonymous · Answer

soo b?

anonymous · Answer

@BlossomCake

jfraser · Answer

If you had a pile of building blocks, like LEGOs, and you made lots of tiny kits out of them, and used every single block, how much would the pile of kits weigh when you were done?

vera_ewing · Answer

What do you not understand about the question?