Section 3.1 in class 1 mol = x 1023 things

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Presentation transcript:

Section 3.1 in class 1 mol = 6.022 x 1023 things Two new conversions: Conversion Factors atoms molecules Avogadro’s Number 6.022 x 1023 particles = 1 mol moles Molar mass molar mass g = 1 mol grams moles

Chemical Formula is a conversion factor molecules atoms moles of molecules moles of atoms

How big is Avogadro’s number. We cover the Earth with 1 mol of dice How big is Avogadro’s number? We cover the Earth with 1 mol of dice. How deep is it? Surface area = 5.1 x 108 km2 1 km2 = 1 x 1010 cm2 1 die = 1 cm3 Height = volume/area

How many atoms in 3.46 mol Fe?

How many atoms in 3.46 mol Na?

How many moles is 80.0 g of Al?

How many atoms in 80.0 g of Al?

Molar Mass is a conversion factor Determining Molar Mass (official) Determining Molar Mass (practical)

Molar Mass is a conversion factor Determining Molar Mass (official) Determining Molar Mass (practical)

Molar Mass is a conversion factor Determining Molar Mass (official) Determining Molar Mass (practical)

What is the mass of 2.60 mol CH4?

How many moles and atoms of each element in 1.50 mol CH3OH?

A sample contains 5.80 x 1024 Ca atoms. What is the mass of Ca?

How many MOLECULES of boron trichloride, BCl3, are present in 1 How many MOLECULES of boron trichloride, BCl3, are present in 1.32 grams of this compound? How many Cl atoms are in the sample?

Which has more oxygen atoms: 12.0 g CH3OH or 40.0 g CBr2O

What is the mass of oxygen in 200 g of CBr2O?