Combined Chapter 2 & 3 Test - Chemistry/Chemistry Honors

(True or False) The metric prefix c means the unit is multiplied by 10^-3.

False

(True or False) The third law of thermodynamics states that the total amount of mass and energy in the universe has remained constant since the universe was created.

False

(Multiple Choice) Which of these SI units is used when measuring the volume of a substance?

cubic meter

(Multiple Choice) Which of the following factors affect(s) precision in measurements?

-mathematical error -improper calibration -procedural error

(True or False) An element's symbol represents the element's name, although sometimes the name and symbol do not begin with the same letter.

True

(Multiple Choice) Scientists classify matter on the basis of its physical and (BLANK) properties.

chemical

(Multiple Choice) Which form of matter has fast-moving and widely spaced particles?

gas

(Multiple Choice) A chemist wants to measure the mass of a lump of coal. What SI base unit will he use?

kilogram

(Multiple Choice) Which form of matter best describes molten lead?

liquid

(Multiple Choice) In the formula Mg(OH)2, the numeral 2 is called a (BLANK).

subscript

(Multiple Choice) What is one way that a mixture cannot be separated?

suspending

(Multiple Choice) A substance can experience a change of states as (BLANK) energy is added to or removed from it.

thermal

(True or False) A compound is a pure substance that cannot be broken down into simpler substances by ordinary chemical means.

False

(True or False) If a scientist is extremely careful and uses precise instruments, a perfect measurement can be obtained.

False

(True or False) In science, the term heat is a synonym for temperature.

False

(True or False) Temperature measures the total kinetic energy in a sample.

False

(Multiple Choice) Which of the following is not one of the six common forms of energy?

dynamic

(Multiple Choice) A pure substance that consists of only one kind of atom is a(n) (BLANK).

element

(Multiple Choice) What indicates the precision of an instrument and helps scientists report measurements honestly?

significant figures

(ESSAY (Honors Chem ONLY) Why is an orderly process for problem solving important?

Answers will vary; 4-5 sentences

(True or False) The number 0.00800 has three significant figures.

True

(True or False) The unit for volume is derived from the SI unit for length, the meter.

True

(True or False) When determining significant figures in multiplication and division problems, and the answer cannot contain more significant figures than the measurement with the least number of significant figures.

True

(Multiple Choice) Hydrogen peroxide (H2O2) is a (BLANK).

compound

(Multiple Choice) What unit is used to measure both energy and work?

joule

(Multiple Choice) Significant figures apply only to (BLANK) data.

measured

(Multiple Choice) The SI unit that represents the number of particles in a substance is the (BLANK).

mole

(Multiple Choice) Copper is used more often than aluminum for electric wires. More than anything else, this suggests that copper is (BLANK) than aluminum.

more conductive

(Multiple Choice) Phosphorus (P4) is a (BLANK).

polyatomic element

(Multiple Choice) An evaluation of the exactness of a measurement or a measuring instrument indicates its (BLANK).

precision

(Multiple Choice) The disappearance of dry ice left out in a dish is an example of (BLANK).

sublimation

(Multiple Choice) After boiling water for a long period of time, you notice that the water level has decreased, indicating that (BLANK) has occurred.

vaporization