Chapters 1-3 Flashcards
(39 cards)
In a chemical reaction, the type of products obtained is largely determined by which part of the reacting chemicals?
Electrons
A golf ball had more mass than a tennis ball because it
Contains more matter
An example of an extensive property of matter is
Mass
What is a physical property of water?
It melts below room temperature
How do vapors and gases differ?
Generally, a gas is in the gaseous at room temperature and a vapor is in either the solid state or liquid state at room temperature
What is an example of a mixture?
Pure air
What is an example of a heterogeneous mixture?
Soil
Distillation
Separating a solid from a liquid by evaporating the liquid
What is an example of a homogenous mixture?
Stainless steel
Compounds
They are substances
More than 1 type of atom bonded together
Can be separated only by a chemical change
What are chemical properties?
Must undergo a change to determine
Physical property
Something that can be tested or measured without a chemical change
Examples of physical properties
Color
Melting/Boiling points
Hardness
Physical change
Changed physical appearance and not the molecule
Chemical change
Changed chemical structure
Substance
Something that is uniform throughout
When paper turns yellow-brown upon exposure to sunlight, what type of change is likely taking place?
Chemical change
What happens to mass during a chemical reaction?
Total mass of the reactants equals the total mass of the products
The closeness of a measurement to its true value is a measure of its
Accuracy
When a test instrument is calibrated, does its accuracy, precision, or reliability improve?
Accuracy
What is the chief advantage of the metric system?
It is in multiples of 10
Which temperature scale has no negative temperatures?
Kelvin
Centimeter
100cm/1m
Millimeters
1000mL/1L
