In a chemical reaction, numbers often appear in front of a chemical fromula. The numbers tell you the
Numbers of molecules or atoms of each subatance in the reaction
What type of reaction is FeS + 2HCI→ FeCl2 H2S
A double replacemnt reaction
Which two processes could be considered opposities?
A synthesis reaction and a decompostion reaction
A bottle of hydorgen peroxide that eventually turns into a bottle of water and oxyegen gas is an example of a
The mininum amout of energy that has to be added to start a reaction is the
Which of the following does NOT increase the number of particles of a subtance aviable to react in a chemical reaction?
adding a catalyst
A material used to decrease the rate of a chemical reaction is a(n)
Chemicals that act as an biological catalysts by speeding up an reaction in living things are
A rapid reaction between oxygen and a fuel is known as
In what way can fire be brought out of control?
What is the best form of fire saftey?
The best way to put out a small kitchen fire is to
Cover it or use a home fire extinguisher
One ex. of chemical change is
Which of the following is NOT an example of chemical change?
Salt disolving in a glass of water