Chemistry Reading #2

Question 1

resolution

Answer 1

the smallest quantity that can be measured or displayed

Question 2

Accuracy

Answer 2

a term that describes how close a measurement is to the true value

Question 3

Precision

Answer 3

term that describes how close measured values are to each other

Question 4

Scientific Notation

Answer 4

a method of writing numbers as a base, times a power of 10

Question 5

Mantissa

Answer 5

a decimal number that multiplies the power of 10 in scientific notation

Question 6

Exponent

Answer 6

the power of 10 for a number written in scientific notation, such as the 2 in the number 5 x 102 = 500

Question 7

Rates

Answer 7

ratios that can be used as they are given or inverted.

Question 8

Dimensional analysis

Answer 8

technique of using conversion factors to convert between units

Question 9

Atomic mass unit (amu)

Answer 9

a mass unit equal to 1.66 x 10–24 g or 1.661 x 10–27 kg

Question 10

Atomic mass

Answer 10

the mass of an atom’s protons and neutrons expressed in atomic mass units (amu) on the periodic table; on the periodic table, calculated as a weighted average that reflects isotope abundance

Question 11

Avogadro’s number

Answer 11

the number of atoms contained in one mole, 6.02 x 1023

Question 12

Molar mass

Answer 12

the mass of one mole of a substance; the term formula mass is used for ionic substances and molecular mass for covalent substances