Chemical Reactions
What are the two parts of a chemical reaction?
Reactants and products
Is this equaction a balanced or not balanced chemical equation?
P4 + O2 → P4O6
Not balanced
All of the following are examples of chemical change except:
Increase in temperature, release of light, formation of a solid, melting of ice
melting of ice
Type of reaction in which two or more substances combine
Synthesis
It shows the types and number of atoms in an element that makes up a compound.
the chemical formula
A substance that enters a chemical reaction is called this.
a reactant
In the formula 5CaSO4,how many oxygen atoms do we have?
20
Type of reaction that releases heat
exothermic
Reaction in which compounds are broken down into simpler products
Decomposition
Is this a balanced or not balanced equation?
H2S + NaCl → HCl + Na2S
Not balanced
In a chemical reaction the substances to the right of the arrow are called this/these?
What is/are products?
How many Aluminum atoms do we have in the products?
Al + O2 → Al2O3
2
- The properties of a compound will be the same as the properties of the elements that make up the compound. Is this statement true or false.
False
Replacement
What does the arrow stand for in a chemical equation?
Yields
hydrogen + oxygen → water
Where are the reactants and products in this chemical reaction?
Reactants: hydrogen and oxygen
Products: Water
When balancing an equation, these numbers can be changed.
a coefficent
Type of reaction that absorbs heat
Endothermic
Three conditions necessary to maintain a fire
Heat, fuel, and oxygen
The study of matter and how matter changes
Chemistry
A hydrocarbon will combine with oxygen and in the process, give off energy in the form of light and heat to produce carbon dioxide and water. What is the chemical change in this reaction?
Formation of light and heat
When balancing an equation, these numbers can not be changed.
subscript
Factor that decreases the rate of a reaction
Inhibitor
Two ways in which water inhibits combustion
covers the fuel, cools the fire
State the Law of Conservation of Mass.
matter can not be created nor destroyed, just rearranged