Law of conservation of mass

Front

Matter can not be created nor destroyed: it can only be

Back

transformed from one form to another

Front

If reaction starts with 20g of reactants, it should produce:

Back

20g of products

Front

In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B have? Options: 4g, 5g, 9g, 14g

Back

4g

Front

Bob puts 200 grams of ice into a pitcher with 900 grams of water. How many grams of water does Bob now have in the pitcher after the ice melts?

Back

1100 grams

Front

__ are the starting substances in a chemical equation.

Back

Reactants

Front

Considering the reaction given, how much zinc was present in the zinc carbonate?

Back

104 grams

Front

How many oxygen atoms are in Fe(NO₃)₂?

Back

6

Front

4 grams of hydrogen and 32 grams of oxygen will combine to form:

Back

36 grams of water

Front

Which of the following is a balanced equation?
Options: 2H2 + O2 = 2H2O, H2 + O2 = H2O, 2H2 + 2O2 = 2H2O, H2 + 2O2 = H2O

Back

2H2 + O2 = 2H2O

Front

In a chemical reaction, 4 grams of sodium must combine with how many grams of chlorine to produce 10 grams of table salt?

Back

6 grams