Foundations of College Chemistry – Test 3 (chapters 6-7)
Unlock all answers in this set
Unlock answersquestion
binary compound
answer
a compoudn containing two parts; the two parts are always ions, a cation and an anion
question
binary formulas
answer
the formula of a binary compound in which the cation is always written first, the anion second (e.g. HCl vs. LiH)
question
mono-valent
answer
an ion having only one possible charge in all compounds; also called univalent (e.g. Na+, K+, Ca+)
question
poly-valent
answer
an ion whose charge can vary depending on which compound it is in (e.g. Iron as an ion has two charges for different compounds)
question
polyatomic ion
answer
an ion containing two or more atoms; also called a polyatomic group
question
oxo-acid
answer
an acid containing oxygen; also called an oxy-acid
question
mole
answer
6.022 x 10^23 of any kind of particle; also called Avogadro's number
question
molar mass
answer
the mass of one mole of a particle
question
natural element
answer
an element as it occurs in nature, as a mixture of different isotopes
question
mass number
answer
number of nucleons in the nucleus of a particular isotope of an element
question
atomic mass
answer
the average of all the mass numbers of isotopes of an element as they occur in nature; (i.e. the mass number average of the \"natural element\")
question
percent composition
answer
the composition by mass of the different elements in a formula, expressed as a percentage
question
empirical formula
answer
a chemical formula giving the simplest whole number mole ratios of atoms in a compound; also called the simplest formula
question
mass basis
answer
a total mass assumed for doing calculations in cases where an actual mass is not stated
