The study of the composition of matter and the changes it undergoes
100
Which state of matter is not easily compresses, and has a definite shape and volume?
Solid
100
What is an element?
Simplest form of matter that has a unique set of properties
100
What is a chemical reaction?
One or more substances change into one or more new substances
100
What is the experimental value when calculating percent error?
The value measured in lab
200
What are the five areas of chemistry?
Organic, inorganic, biochemistry, analytical and physical
200
What is a physical change?
Some properties of the material change, but the composition does not
200
What is a chemical change?
Change that produces matter with a different composition than the original matter
200
What do we call the compounds or elements present at the start of the reaction?
Reactant
200
What is the difference between precision and accuracy?
Accuracy: Measure of how close a measurement comes to the actual or true value of whatever is measured.
Precision: A measure of how close a series of measurements are to one another
300
What is the difference between pure and applied chemistry?
Pure: Pursuit of chemical knowledge for its own sake.
Applied: Research toward a practical goal.
300
What state of matter is an indefinite shape and volume and easily compressed?
Gas
300
What is the difference between a heterogeneous mixture and homogeneous mixture and give an example of each
Hetero: Mixture where composition is not uniform throughout. Chicken noodle soup
Homogeneous: Mixture in which the composition is uniform throughout. Coffee
300
What is the substance produced at the end of the reaction?
Product
300
How do we determine the correct number of significant figures when adding numbers?
Go by the number of digits to the right of the decimals. If there are two digits after the decimal, such as in 11.833+12.17= ?. Your answer can only have two digits after the decimal.
400
Describe intensive and extensive properties and give an example for each.
Intensive: Depends upon the type of matter. Clothing
Extensive: Depends on the amount of matter. Mass, volume
400
What is a substance?
Matter that has a uniform and definite composition.
400
Describe the two processes that we use to separate mixtures.
Filtration: Process that separates solids from liquids
Distillation: Liquid is boiled to produce a vapor that is condensed into a liquid
400
What is the law of conservation of mass?
During any chemical reaction, the mass of the products is always equal to the mass of the reactants.
400
How do you determine the number of significant figures when multiplying or dividing?
Round your answer to a number that has the least number of significant figures.
500
Name a career that one may have in biochemistry
Doctor
500
What two ways can physical changes be classified?
Reversible or irreversible
500
What does it take to separate water into Hydrogen and Oxygen?
Electricity
500
What are the four clues that a chemical change has occurred?
Transfer of energy, change in color, production of a gas, and the formation of a precipitate.
500
How many significant figures are in the number:
.47890