conservation of mass Flashcards
1
Q
what is the law of conservation of mass
A
no atoms are lost or made during a chemical reaction so the mass of the product equals the mass of the reactants
2
Q
what are the starting materials in a chemical reaction called?
what are the formed materials in a chemical reaction called?
A
the reactants
the products
3
Q
92 grams of sodium reacts with 32 grams of oxygen
calculate the mass of sodium oxide produced
A
124g
no atoms are lost or made during a chemical reaction so the mass of the product equals the mass of the reactants
4
Q
a mass of calcium carbonate reacted to produce 112g of calcium oxide and 88g of carbon dioxide
A
200g calcium carbonate
calcium carbonate -> calcium oxide + calcium dioxide
CaCO3->112g+88g
200g-> 112g + 88g
