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The Mole Mole: the amount of a substance that contains as many particles as there are in exactly 12g of carbon-12 A mole is similar to a dozen
Avogadro’s Number Avogadro’s number: the number of particles in exactly one mole of a pure substance Avogadro’s number = 6.022x1023
The Mole 1 mol = 6.022 x 1023 atoms Look it’s a conversion factor!Convert 2.56 mols of Ca to atoms Convert 5.63 x 1022 molecules of CuBr2 to mols
Molar Mass Molar Mass: The mass of one mole of a substanceUnit for molar mass is g/mol Molar mass is numerically equal to the average atomic mass in amu
Molar Mass Molar mass of lithium is 6.941 g/mol or 6.941 g 1 molMolar mass is a conversion factor Convert 2.34 mol of Li to g Convert 150 g of Pb to mol
Molar Mass You can also find the molar mass for a molecular compound.Convert 54.2 g of silver nitrate to mols.
The Mole Highway Mass Mole (g) (mol) Amount of a Substance (atoms)× 1 𝑚𝑜𝑙 𝑚𝑜𝑙𝑎𝑟 𝑚𝑎𝑠𝑠 × × 𝑎𝑡𝑜𝑚𝑠 1 𝑚𝑜𝑙 Mass (g) Mole (mol) Amount of a Substance (atoms) × 𝑚𝑜𝑙𝑎𝑟 𝑚𝑎𝑠𝑠 1 𝑚𝑜𝑙 × 1 𝑚𝑜𝑙 × 𝑎𝑡𝑜𝑚𝑠
Using the Mole Highway Convert .0025 g of potassium to molConvert 2.22 x 1021 atoms of copper to mol Convert 589 g of oxygen to molecules Convert 5.67 x 1025 molecules of zinc nitrate to grams
TRY IT!!!! Convert 859 g of Co to molConvert 9.88 x 1022 atoms of K to mol Convert mol of nickel (II) chloride to g Convert 12.3 g of potassium permanganate to molecules
I. Converting between Particles and Moles II
7.3 USING CHEMICAL FORMULAS APRIL 27, USING CHEMICAL FORMULAS Formula Masses: Sum of all the average atomic masses of all atoms represented.
What is the molar mass of Calcium Chloride (CaCl2) (to the nearest tenth!)? 111.1g/mol.
1 By definition: 1 atom 12 C “weighs” 12 amu On this scale 1 H = amu 16 O = amu Atomic mass is the mass of an atom in atomic mass units (amu)
Mass Relationships in Chemical Reactions Chapter 3.
What is the percent composition of N and O in NO 2 ?
I can calculate the molar mass of a compound Sometimes the molar mass is called the formula mass!
The Mole Chapter 9 What is a mole? A mole of a substance is the amount of that substance which contains 6 x particles of that substance.
Molar Mass & Conversions. The Mole mole (mol)- SI Unit for the amount of a substance that contains as many particles as there are atoms in exactly 12g.
Chemical Formulas and Compounds Using Chemical Formulas.
Chapter 8. The number of particles in a mole is called as Avogadro’s constant or number. This unit called the mole, is defined as the number of atoms.
Atoms: The building blocks of Matter
Review: Molar Mass of Compounds
How to Count Atoms What unit is used to count donuts? Would that unit be appropriate for counting the # of people in Jacksonville? Would it be appropriate.
The Mole Objective What is a MOLE???? An amount of a substance A unit of measurement specific to chemistry mole mol n.
The MOLE CH 11.
Mass Relationships in Chemical Reactions. By definition: 1 atom 12 C “weighs” ________ On this scale 1 H = ________ amu 16 O = ________ amu _________________.
Mole Concept. Counting Units A pair refers to how many shoes? A dozen refers to how many doughnuts or eggs? How many pencils are in a gross? How.
Warm-Up Calculate Molar Mass K2O PCl5 LiF.
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