Matching
Classify each as either a physical or chemical change.
A. Crushing an aluminum can
B. Recycling used aluminum cans to make new aluminum cans
C. Aluminum combining with oxygen to form aluminium oxide
A. Physical
B. Physical
C. Chemical
What is the mass of a product if the reactants have mass of 44.6 grams (Fe) and 12.8 grams (O2 )?
31.8 grams
571 grams
3.48 grams
57.4 grams
57.4 grams
a homogeneous mixture
Solution
the grid organizing elements into periods and groups
periodic table
a form of matter with a definite shape and volume
Solid
Classify each of the following words as a physical or chemical change:
A. Boil
B. Freeze
C. Condense
A. Physical
B. Physical
C. Physical
A 20.0-g sample of sucrose contains 8.4 g of carbon. What is the mass percentage of carbon in sucrose? 68.00%
42.00%
27.76%
72.24%
42.00%
law that states that mass is neither created nor destroyed in a chemical reaction
conservation of mass
the ratio of the mass of each element to the total mass of the compound
Percent by Mass
Make me laugh
laughter
Classify each of the following words as a physical or chemical change:
A. Crush
B. Vaporize
C. Explode
A. Physical
B. Physical
C. Chemical
Which of the following is not a compound?
water
potassium iodide
sodium chloride
hydrogen
hydrogen
law that states that regardless of the amount, a compound is al‐ ways composed of the same elements in the same proportion by mass
definite proportions
three physical forms that describe the matter that exists on Earth
States of Matter
An alloy is which of the following?
A. Solid-Solid Solution
B. Heterogeneous Mixture
C. Homogeneous Mixture but not a Solution
D. Compound
A. Solid-Solid Solution
Classify each of the following words as a physical or chemical change:
A. Tarnish
B. Ferment
C. Burn
D. Corrode
A. Chemical
B. Chemical
C. Chemical
D. Chemical
How are elements in the periodic table organized?
A. They are not organized in any particular pattern.
B.They are organized alphabetically by their chemical symbols.
C.They are organized into horizontal rows called periods and vertical columns called groups.
D.They are organized into horizontal rows called groups and vertical columns called periods.
C
law that states that different masses of one element combine with the same relative mass of another element to form different compounds
multiple proprtions
a technique that separates the components of a mixture
Chromatography
Which of the following is correct?
A. Density is an extensive property.
B. Volume is an intensive property.
C. Intensive and extensive properties are chemical properties.
D. External conditions can affect both physical and chemical properties.
D. External Conditions can affect both physical and chemical properties.
A. Sterling Silver (Silver & Copper)
B. Gold
C. Methane
D. Steam
A. Alloy
B. Element
C. Gas
D. Vapor
Before a chemical reaction, you measure the mass of the reactants. A chemical reaction occurs. You measure the mass of the products. Which is the correct relationship between the two masses? massreactants > massproducts
massreactants < massproducts
massreactants ≠ massproducts
massreactants = massproducts
massreactants = massproducts
a separation technique that results in the formation of pure solid particles from a solution
crystallization
a form of matter with a constant volume that takes the shape of its container
liquid
Which of the following is a chemical property of copper?
A. It is shiny.
B. It has a density of 8.96 g/cm3.
C. It has a melting point of 1085°C.
D. It forms a new compound when it interacts with moist air.
D. It forms a new compound when it interacts with moist air.