General Science - Physical Science: Chemistry - Simple Chemical Reactions
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Through how many primary ways may matter undergo change?
Two ways
Matter may change in __________ ways.
two
Which of these represents one of the ways matter can change?
Physical change
Which of these represents a way matter can change?
Chemical change
Which physical property of matter is altered during a physical change?
Form
Which of the following is also altered in a physical change?
Size
Which aspect of matter may be changed during a physical alteration?
Shape
Which of the following is NOT listed as a property altered during a physical change?
Chemical composition
Which option correctly lists the properties of matter altered during a physical change?
The form, size, or shape of matter
What happens to molecules themselves during a physical change?
The molecules themselves remain unchanged
The molecules themselves remain __________ in a physical change.
unchanged
Which of these processes is identified as a physical change?
Melting ice into water
Which of these is also listed as an example of a physical change?
Breaking a glass
Which process represents another example of a physical change?
Dissolving sugar in water
Which of these is NOT classified as a physical change?
The burning of coal
Which option correctly lists examples of physical changes?
Melting ice into water, breaking a glass, and dissolving sugar in water
What is the status of the substances involved after a physical change occurs?
The substances involved are still the same afterward
The substances involved are still the __________ afterward in a physical change.
same
What happens to the molecules themselves during a chemical change?
The molecules themselves are rearranged
In a chemical change, the molecules themselves are __________.
rearranged
What outcome results from a chemical change regarding substance creation?
A chemical change produces new substances with different properties
A chemical change produces __________ substances with different properties.
new
Which of these processes is identified as a chemical change?
The burning of coal
Which of these is also listed as an example of a chemical change?
The rusting of iron
Which process represents another example of a chemical change?
The souring of milk
Which of these is NOT classified as a chemical change?
Melting ice into water
Which option correctly lists examples of chemical changes?
The burning of coal, the rusting of iron, and the souring of milk
What term defines the process by which a chemical change occurs?
A chemical reaction
A chemical reaction is the process by which a chemical change __________.
occurs
What term describes the substances that enter a reaction?
Reactants
The substances that enter the reaction are called __________.
reactants
What term describes the new substances produced by a chemical reaction?
Products
The new substances produced by a chemical reaction are called __________.
products
In what common format are chemical reactions written using chemical symbols?
As equations
Chemical reactions are commonly written as __________ using chemical symbols.
equations
What product results from the burning of carbon in oxygen?
Carbon dioxide
The burning of carbon in oxygen produces carbon __________.
dioxide
Which formula represents the chemical equation for burning carbon in oxygen?
C + O(2) → CO(2)
The equation for burning carbon in oxygen is written as __________.
C + O(2) → CO(2)
What numeric property characterizes a balanced chemical equation on both sides?
The same number of each type of atom
A balanced chemical equation has the __________ number of each type of atom on both sides.
same
What is the relationship between inputs and outputs in a balanced chemical equation?
What goes in must equal what comes out
How do the incoming substances compare to the outgoing substances in a balanced equation?
What goes in must equal what comes out
What happens to individual atoms during a chemical reaction regarding their existence?
Atoms are not created or destroyed
Atoms are not created or __________ in a chemical reaction.
destroyed
Which formula represents the chemical equation for burning carbon in oxygen?
C + O(2) -> CO(2)
The equation for burning carbon in oxygen is written as __________.
C + O(2) -> CO(2)
How is the equation for hydrogen and oxygen forming water classified regarding its equilibrium status?
Not balanced
The equation for hydrogen and oxygen forming water is __________ balanced.
not
Having two oxygen atoms on the left side is characteristic of which chemical equation?
The equation for hydrogen and oxygen forming water
The equation for hydrogen and oxygen forming water has __________ oxygen atoms on the left.
two
How many oxygen atoms are present on the right side of the equation for hydrogen and oxygen forming water?
One oxygen atom
The equation for hydrogen and oxygen forming water has only __________ oxygen atom on the right.
one
By what method can chemical equations be balanced?
Adjusting the coefficients
Chemical equations can be balanced by adjusting the __________.
coefficients
What defines coefficients in a chemical equation?
The numbers in front of each substance
Coefficients are the numbers in __________ of each substance.
front
What is the relationship governing how coefficients are adjusted in an equation?
Coefficients are adjusted until the totals match on both sides
Until what condition is met are coefficients adjusted in an equation?
Until the totals match on both sides
Which formula represents the balanced equation for hydrogen and oxygen forming water?
2H(2) + O(2) -> 2H(2)O
The balanced equation for hydrogen and oxygen forming water is written as __________.
2H(2) + O(2) -> 2H(2)O
Having four hydrogen atoms on each side is characteristic of which balanced equation?
The balanced equation for hydrogen and oxygen forming water
The balanced equation for hydrogen and oxygen forming water contains __________ hydrogen atoms on each side.
four
How many oxygen atoms are present on each side of the balanced equation for hydrogen and oxygen forming water?
Two oxygen atoms
The balanced equation for hydrogen and oxygen forming water contains __________ oxygen atoms on each side.
two