Chem 103 Chapters 1-3 Practice Questions And Correct Answers.

What is Chemistry? - correct answer Study of matter What is Matter? - correct answer Anything that has mass and takes up space Matter has both ______ and _______ properties - correct answer Physical; chemical What are physical properties? - correct answer Characteristics observed or measured without changing the identity of a subtstance What are the three states of matter? - correct answer Solid, Liquid and Gas Solids - correct answer Definite volumes and shapes Liquids - correct answer Definite volumes, but take the shapes of containers Gases - correct answer No definite volume or shape What two properties involve state changes for physical properties? - correct answer Melting and Boiling point 4 Basic elements Ancient Greeks used - correct answer Earth, air, fire, water Volume - correct answer Amount of space a substance occupies Mass - correct answer Measure of the quantity of material it contains Weight - correct answer Measure of the gravitational pull on an object Temperature - correct answer How hot/cold something is (water freezes at 0 C and boils at 100 C) Scientific Notation - correct answer Has a coefficient, a power of 10, and a unit of measurement Measured Numbers - correct answer Numbers you obtains when you measure quantity using a measuring tool (all measurements are measured numbers) Which types of numbers always have uncertainty in every measurement? - correct answer Measured numbers Significant Figures - correct answer Digits in any measurement known with certainty, plus one digit that is uncertain Non- significant Figures - correct answer Zeros at beginning of decimal number used as a placeholder in a large number without a decimal point Exact numbers - correct answer Numbers obtained by counting items Which types of numbers aren't measured? - correct answer Exact numbers List rules for adding/subtracting sig figs - correct answer Answer has same number of decimal places as measurement with the fewest decimal places List rules for multiplying/dividing sig figs - correct answer Which ever sig fig amount you started with you must end with in your final answer Atomism - correct answer Universe composed of atoms moving through the void Who was born around 460BCE? - correct answer Democritus 3 words used to describe atoms - correct answer Miniscule, invisible, indivisible Atomos - correct answer Uncuttable Who attempted to turn base metals into gold? - correct answer Alchemists Who designed first laboratory equipment and developed early lab procedures? - correct answer Alchemists Alchemists attempted to find the - correct answer Philosopher's stone What is another word for "Philosopher's stone?" - correct answer Elixir of Life Scientific method - correct answer Process used by scientists to explain the observations in nature List the things the Scientific Method involves - correct answer Making observations, writing a hypothesis, doing experiments, and proposing a theory What is the primary resource for chemists as well as other scientists? - correct answer Periodic table Element - correct answer A substance that can not be broken down into simpler substances by chemical means Measurements used in Chemistry - correct answer Length, mass, volume, density What do units in the Metric System consist of? - correct answer A base unit plus a prefix 1 meter= - correct answer 1.09 yards 1 gram= - correct answer 1/454 pound 1 liter= - correct answer 1.06 quarts What do measured numbers convey? - correct answer Magnitude, units, precision Chemical Properties - correct answer Ability of a substance to interact with other substances; to change into a new substance Physical Properties - correct answer Characteristics observed or measured without changing the identify of a substance Density - correct answer A ratio of the mass of an object divided by its volume Conversion factor - correct answer A ratio that specifies how one unit of measurement is related to another