Chapter 7 vocabulary

Question 1

Mole (mol)

Answer 1

represents 6.02 x 10^23 representative particles of that substance

Question 2

Avagadro’s number

Answer 2

the experimentally determined number 6.02 x 10^23. In honor of Amedeo Avagadro di Quaregna ( 1776-1856)

Question 3

representative particle

Answer 3

refers to the species present in a substance: usually atoms, molecules or formula units (ions)

Question 4

Gram atomic mass (gam)

Answer 4

the atomic mass of an element expressed in grams

Question 5

Gram molecular mass (gmm)

Answer 5

The mess of 1 mole of any molecular compound

Question 6

Gram formula unit (gfm)

Answer 6

The mass of one mole of an ionic compound

Question 7

Molar mass

Answer 7

the mass (in grams) of one mole of the substance

Question 8

Standard temperature and pressure (STP)

Answer 8

standard temperature = 0^c

standard pressure + 101,3 kPa/ 1 atmosphere (atm)

Question 9

Molar volume

Answer 9

the quantity 22.4L is measured at STP

Question 10

Percent composition

Answer 10

the relative amount of each element in a compound. (percent by mass of each element in a compound)

Question 11

Emperical formula

Answer 11

gives the lowest whole-number ration of the atoms of the elements in a compound