Anything that has mass and takes up space is known as?
What is Matter
100
what are three of the five kinds of evidence you can use to determine if a chemical reaction has occured?
What is change in color, formation of a precipitate, production of gas bubbles, change in texture, and change in energy.
100
FeS, HCl, and NaCl are all examples of ____________
What is Chemical formulas
100
The study of matter and how it changes
What is Chemistry
100
True or false and you must explain
chemical equations must contain the same amount of atoms on each side of the arrow
What is True- according the principal of conservation of mass all atoms that are present at the beginning of the chemical reaction are present at the end of the chemical reaction
200
changes or alters the form or apperance of a substance but that does not make the substance into another substance
What is physical change
200
When chemical bonds break and new bonds form it is known as
What is chemical reaction
200
A shorter easier way to write chemical reactions, using symbols instead of words is known as
What is chemical equations
200
True or False and explain your answer:
The Principal of mass only applies in a closed system
What is False because the principal of conservation of mass applies to all chemical reactions
200
what are the three types of chemical reactions
What is synthesis, decomposition, and replacment
300
a characteristics of a substance that can be observed without changing the substance into another substance
What is physical property
300
what are the two main kinds of changes that you can observe in a chemical reaction
What are the formation of a new substance and changes in energy.
300
substances on the right side of the "yield" sign are
What is products
300
What takes place when a chemical reaction takes place in a closed system?
What is a closed system
300
FeS + 2HCl = FeCl2 + H2S is this type of of chemical reaction
What is double replacement
400
water is made of hydrogen atoms and oxygen atoms in a 2 to 1 atoms, does not burn, and reacts with metal. This are all examples of _____________ of water
What is chemical properties
400
A chemical reacion that absorbs energy in the form of heat is known as ______
What is an endothermic reaction
400
in a chemical reaction when matter can enter from or escape to the surroundings it is known as
What is an open system
400
a process called _____________ breaks down compounds into simpliar compounds in a reaction
What is decomposition
400
which two types of chemical reactions are considered to be oppisites of one another?
What is Synthesis(combine) and decomposition (breaks down)
500
the burning of magnesium is an example of ___________
What is chemical change or chemical reaction
500
A solid that forms from solution during a chemical reaction
What is a precipitate
500
Balance the following equation:
Cu2O + C = Cu + CO2
What is
2Cu2O + C = 4Cu =CO2
500
It is a cool fall night and we are having a bonfire. The wood that is reacting with the air and releasing heat is an example of an_______________
What is exothermic reaction
500
what are the three steps to balancing chemical equations
What is 1)write the equations 2)count the atoms 3)use the coeffcients to balance the atoms