Molar Mass
What is the Molar Mass of H2O
18.0148 g/mol
What is Avogardos Number?
6.022 x 10^23
Ions with a positive charge are known as __________ while Ions with a negative charge are known as _____________
Cations, anions
The periodic table
What is the Molar Mass of Sodium Chloride
Na- 22.990
Cl- 35.453
=58.443 g/mol
grams/ mole
______________ are composed of atoms that are held together in molecules by covalent bonds
hint: Nonmetals + Nonmetals make these
Molecular Compounds
How many Atomic Mass Units are in 1 atom of Gold
196.97 amu
Note: same as the Molar Mass
What is the Molar Mass of C6H12O6
180.1548 g/mol
How many moles are in 25 grams of Carbon
2.08 moles of Carbon
What is Molar Mass
The mass of one molecule of a molecular compound.
It is the sum of the atomic masses of the atoms of that compound
Ionic Compounds consist of _______________ and ____________
Metal + Nonmetal
What is the molar mass of PbSO4
=303.26 g/mol
How many molecules are in 643 grams of Na?
= 1.68*10^25 molecules
Work (643 g Na/1) * (1 mol/ 22.990 g Na) * (6.022 * 10^23 molecules Na/ 1 mol) = 1.68*10^25 molecules
The three subatomic Particles of the Atom are _________, ___________, and ______________
The three subatomic Particles of the Atom are ____protons_____, ___Neutrons________, and ___Electrons___________
Nonmetals form ___________ and metals form _____________ (give an example of each)
Nonmetals form __Anions_________ and metals form ___Cations__________
Nonmetal: Cl tends to form Cl-
Metal: Na tends to form Na+
What is the Molar Mass of Al2 (SO4)3
342.15 g/mol
How many miligrams do 1.36 x 10^ 7 NaCl atoms weigh?
= 1.30 x 10^ -12 mg of NaCl
What is a Formula Unit?
The smallest electrically Neutral unit of an ionic Compound
ex: NaCl
A Formula Unit
What are the "timeline steps needed to convert grams to molecules"
grams given -> Molar mass-> Avogadro's number-> Molecules