Chemistry Final Exam

0.05 cm is the same as a. 0.5 mm b. 0.00005 m c. 0.005 mm d. 0.05 m

0.5 mm

How many minutes are in one week? a. 100,800 b. 10,080 c. 168 d. 1440

10,080

Using a metric ruler with 1 mm divisions, the sides of a rectangular piece of plywood are measured as 3.54 cm and 4.85 cm, which corresponds to an area of 17.1690 cm. Which of these expresses the area correctly? a. 17.169 cm b. 17.17 cm. c. 17.1 cm. d. 17.2 cm.

17.2 cm.

The speed of light is 300,00 km/s. In scientific notation, this speed is written to one significant figure as

3 *10^5 km/s

Which of these measurements has been expressed in four significant figures? a. 402.10 b. 0.0020 c. 30.00 d. 0.0402

30.00

A mixture is a. any substance with a uniform composition b. a combination of pure substances bonded chemically c. a blend of any two or more kinds of matter, as long as each maintains its own unique properties d. any group of elements that are chemically bonded to eachother

a blend of any two or more kinds of matter, as long as each maintains its own unique properties

A physical change occurs when a a. bracelet turns your wrist green b. peach spoils c. a silver bowl tarnishes d. a glue gun melts a glue stick

a glue gun melts a glue stick

It is easy to determine if a substance is a metal if the substance is a. a good electrical and heat conductor b. easy to break down into its components c. very hard d. very brittle

a good electrical and heat conductor

A chemical change occurs when a. ethanol is purified through distillation b. salt deposits from evaporated seawater c. dissolved minerals solidify to form a crystal d. a leaf changes color in the fall

a leaf changes color in the fall

A homogeneous mixture is also called a. a compound b. a solute c. chemically bonded d. a solution

a solution

A chemical can be defined as a. any substance that is not alive b. an unnatural additive placed in food c. a toxic substance d. a substance that has a definite composition

a substance that has a definite composition

A compound is a. a substance, made of two or more atoms that are chemically bonded, that can be broken down into simpler, stable substances b. any substance, whether it is chemically bonded or not c. a pure substance that cannot be broken down into simpler, stable substances d. the smallest unit of matter that contains its chemical identity

a substance, made of two or more atoms that are chemically boned, that can be broken down into simpler, stable substances

Which of the following is an example of a homogeneous mixture? a. orange juice b. raw milk c. air d. marble

air

A solid substance is a. always losing particles regardless of its container b. always the same shape regardless of its container c. always frozen regardless of its container d. always a crystal regardless of its container

always the same shape regardless of its container

Plasma is the fourth state of matter. In the plasma state a. atoms gain electrons b. atomic nuclei break down c. atoms lose electrons d. atoms form molecules

atoms lose electrons

A nonmetal is usually a. a good conductor b. malleable c. used to make jewelry d. brittle

brittle

Which of the following IS NOT a physical change? a. cutting b. boiling c. burning d. grinding

burning

Organic chemistry is the study of a. the chemistry of living things b. carbon-containing compounds c. properties, changes, and relationships between energy and matter d. crystals and minerals

carbon-containing compounds

An apple turning brown after being cut is an example of a _____ change.

chemical

Which of the following is an intensive property of matter? a. volume b. density c. amount of energy d. mass

density

All of the following are SI units for density EXCEPT a. g/cm^3 b. kg/m^2 c. g/m^2 d. kg/L

g/m^2

Which of the following is an example of a heterogeneous mixture? a. sea water b. a gold ring c. sucrose d. granite

granite

The vertical columns on the periodic table are called a. groups b. periods c. elements d. rows

groups

If a mixture is not uniform throughout, it is called a. chemically bonded b. heterogeneous c. homogeneous d. a solution

heterogeneous

If a mixture is uniform in composition, it is said to be a. chemically bonded b. heterogeneous c. a compound d. homogeneous

homogeneous

What happens to the energy in a substance when it changes state? a. it is destroyed b. it changes form, but neither is destroyed or increased c. the energy remains unchanged d. it is changed into matter

it changes form, but neither is destroyed or increased

A sample of matter can be poured from container to container. It takes the shape of the container, but only takes up a certain volume. Based on this info, the sample is in the ______________ state.

liquid

A state of matter in which a material has no definite shape but has a definite volume is the ________ state. a. plasma b. liquid c. solid d. gas

liquid

A measure of the quantity of matter is a. weight b. mass c. volume d. density

mass

The quantity of matter per unit volume is a. weight b. mass c. density d. inertia

mass

Which of the following IS NOT a chemical change? a. melting b. burning c. rusting d. igniting

melting

All known elements are organized into groups based on similar chemical properties in the a. element table b. periodic chart c. chemical chart d. none of the above

none of the above

The horizontal rows on the periodic table are called a. families b. periods c. actinides d. elements

periods

The melting of butter is a ______ change because it does not produce any new substances.

physical

Nitrogen monoxide and oxygen, both colorless gases, form a red-brown gas when mixed. Nitrogen monoxide and oxygen are called the a. reactants b. products c. equilibria d. synthetics

reactants

The oxygen in air causes iron to rust. Iron and oxygen are ______ in this process, and rust is the product.

reactants

Metalloids are often a. unreactive b. semi conductors c. from outer space d. lanthanides

semi conductors

The two most important properties of all matter are a. the ability to carry an electric current well and hold electric charges b. being brittle and hard c. being malleable and ductile d. taking up space and having mass

taking up space and having mass

Biochemistry is the study of a. the chemistry of living things b. properties, changes, and relationships between energy and matter c. crystals and minerals d. carbon-containing compounds

the chemistry of living things

An atom is a. smaller than an electron b. the smallest unit of a compound c. always made of carbon d. the smallest unit of matter that maintains its chemical identity

the smallest unit of matter that maintains its chemical identity

Noble gases are in group 18, and are best known because they are a. rare b. unreactive c. excellent conductors d. lanthanides

unreactive

Under ordinary conditions of temperature and pressure, the particles in a gas are a. very far from one another b. closely packed c. unevenly distributed d. held in a fixed position

very far from one another

Which of the following is an EXTENSIVE property of matter? a. volume b. boiling point c. melting point d. density

volume