Classifying Matter
Atoms in Chemical Reactions
Unique Properties of Water
Acids & Bases
The Law of Conservation of Mass
100
This pure substance cannot be broken down into simpler substances by chemical means because it consists of only one type of atom.
A) Compound
B) Element
C) Solution
D) Heterogeneous Mixture
B) Element
100
Located on the left side of a chemical equation, these are the starting substances before a chemical reaction occurs.
A) Products
B) Coefficients
C) Reactants
D) Subscripts
C) Reactants
100
This property describes water molecules sticking directly to other water molecules.
A) Adhesion
B) Cohesion
C) Solubility
D) Viscosity
B) Cohesion
100
Pure, neutral water has this exact value on the pH scale.
7
100
The Law of Conservation of Mass states that matter/mass cannot be ______________ or _________________ in a chemical reaction.
created
destroyed
200
Water (H2O) and Table Salt (NaCl) belong to this category because two or more different elements are chemically bonded together.
A) Compound
B) Element
C) Mixture
D) Solution
A) Compound
200
In the chemical formula $2\text{H}_2\text{O}$, this specific number indicates that there are two total molecules of water.
A) Subscript
B) Coefficient
C) Atomic mass
D) Atomic number
B) Coefficient
200
This property allows water molecules to stick to different surfaces, such as water clinging to the glass of a graduated cylinder.
A) Evaporation
B) Cohesion
C) Surface Tension
D) Adhesion
D) Adhesion
200
Lemon juice, vinegar, and stomach acid all taste sour and fall into this category because their pH values are less than 7.
A) Bases
B) Salts
C) Neutrals
D) Acids
D) Acids
200
If 10 grams of Reactant A reacts completely with 15 grams of Reactant B in a closed container, this will be the total mass of the products.
25 grams
300
Trail mix, granite rock, and a salad are examples of this type of mixture where individual components are visibly separate and unevenly distributed.
A) Homogeneous Mixture
B) Element
C) Heterogeneous Mixture
D) Compound
C) Heterogeneous Mixture
300
In this equation for photosynthesis, how many atoms of O (oxygen) are in the products?
18
C6H12O6 = 6 atoms
6 O2 = 12 atoms
300
Thanks to cohesion creating an elastic-like "film" on top of water, water strider insects can "walk on water". What property of water makes this possible?
A) Erosion
B) Adhesion
C) Surface Tension
D) Evaporation
C) Surface Tension
300
Bleach, soap, and drain cleaner feel slippery and fall into this category because their pH values are greater than 7.
A) Acids
B) Neutrals
C) Bases
D) Elements
C) Bases
300
During a chemical reaction, mass stays the same because atoms are not lost or gained; they are simply doing this.
A) Destroyed
B) Rearranged
C) Converted into new elements
D) Shrinking in size
B) Rearranged
400
What does this picture represent?
A) Homogeneous Mixture
B) Compound
C) Heterogeneous Mixture
D) Element
B) Homogeneous Mixture
400
Small numbers placed after and below an element's symbol (like the '2' in CO2) tell you this specific piece of information.
A) The number of molecules in the reaction
B) The number of atoms of that specific element
C) The mass of the element
D) The electrical charge of the element
B) The number of atoms of that specific element
400
Water moves upward against gravity from a plant's roots to its leaves through tiny tubes using adhesion and cohesion, a process known as this.
A) Capillary Action
B) Surface Tension
C) Thermal Expansion
D) Photosynthesis
A) Capillary Action
400
Acids taste...
A) Sour
B) Bitter
C) Sweet
D) Spicy
A) Sour
400
3 molecules of water (H2O) would contain
How many atoms of Hydrogen?
How many atoms of Oxygen?
6 atoms of Hydrogen
3 atoms of Oxygen
500
What does this picture represent?
A) Homogeneous Mixture
B) Compound
C) Heterogeneous Mixture
D) Element
D) Element
500
Name the elements present and how many of each element are in
NaHCO3
Sodium = 1
Hydrogen = 1
Carbon = 1
Oxygen = 3
500
Rain droplets form tight, rounded spheres in the air rather than flattening out primarily due to this specific water property.
A) Adhesion
B) High Density
C) Surface Tension
D) Low Viscosity
C) Surface Tension
500
Bases taste...
A) Sour
B) Bitter
C) Sweet
D) Spicy
B) Bitter
500
How many grams of the reactant, O2 , were used in the reaction?
75 grams of O2
130 + 65 = 195
195 - 120 = 75