tb ch 6, 9.1, 9 · 2018. 2. 15. · tb ch 6, 9.1, 9.2 aim: what is a mole and how do we find the...
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Introduction to the mole and GFM 2018.notebook February 15, 2018
Unit 8: The Mole and Stoichiometry
TB Ch 6, 9.1, 9.2
Aim: What is a mole and how do we find the mass in 1 mole of a substance?
What is a mole anyway?
Avogadro's Hypothesis
1 mole = 6.02 x 1023 particles (atoms or molecules)
What is a mole in Chemistry?
602,000,000,000,000,000,000,000
Mole: a unit that measures a specific quantity of atoms or molecules (both considered particles).
If we distributed 6.02 x 1023 dollars among the entire population of the planet each person would still have approximately 89 trillion dollars to spend
How much is a mole really?
Introduction to the mole and GFM 2018.notebook February 15, 2018
Why do we use moles?• In Chemistry we can use the mole to count the EXACT particles of a substance BECAUSE...
H
O
H1 mole = 6.02 x 1023 particles (molecules or atoms)
1 mole= 22.4 liters of any gas at STP
1 mole= the gramformula mass (GFM) for ANY substance.
Gramformula mass (GFM): the mass of the formula of a substance measured in grams.A.K.A. molar mass, molecular mass, or formula mass.
The GFM equals the mass in grams of 1 mole of any substance.
Calculating Gram Formula MassGFM is calculated by adding the masses of ALL of the atoms in a chemical formula.Round masses from the periodic table to the nearest tenth.
What is the mass of 1 mole of H2O?
3. What is the gram formula mass of sodium, Na?
2. What is the mass of 1 mole of FeSO3?
Calculating Gram Formula MassGFM is calculated by adding the masses of ALL of the atoms in a chemical formula.Round masses from the periodic table to the nearest tenth.
What is the mass of 1 mole of H2O?
3. What is the gram formula mass of sodium, Na?
2. What is the mass of 1 mole of FeSO3?
GFM H2OH: 2 x 1.0= 2.0 gO: 1 x 16.0= 16.0 gGFM= 18.0 g/mol
GFM FeSO3Fe: 2 x 1.0= 2.0 g GFM= 135.9 g/molS: 1 x 16.0= 32.1 gO: 3 x 16.0 = 48.0 g
2. CuSO4
3. Mg(OH)2
4. Ca3(PO4)2
1. Ca2SO4
5. LiOH
Find the GFM for the following substances:
Introduction to the mole and GFM 2018.notebook February 15, 2018
Calculating Gram Formula Mass
Formula # of atoms of each element
Multiply each number of atoms by its atomic mass
Add up the numbers to get the gram formula mass
NaCl
H2SO4