The Mole: A Measurement of Matter 10.1 The Mole: A Measurement of Matter You could measure the amount of sand in a sand sculpture by counting each grain of sand, but it would be much easier to weigh the sand. You’ll discover how chemists measure the amount of a substance using a unit called a mole, which relates the number of particles to the mass.
10.1 Measuring Matter Measuring Matter What are three methods for measuring the amount of something?
10.1 Measuring Matter You often measure the amount of something by one of three different methods—by count, by mass, and by volume. You can buy items by different types of measurements, such as a count, a weight or mass, or a volume. Classifying Which of these common items are being sold by weight? By volume? By count?
10.1 What is a Mole? What Is a Mole? How is Avogadro’s number related to a mole of any substance?
10.1 What is a Mole? A mole of any substance contains Avogadro’s number of representative particles, or 6.02 1023 representative particles. 1 mole = 6.02 x 10 23 RP
10.1 What is a Mole?
Converting Number of Particles to Moles 10.1 What is a Mole? Converting Number of Particles to Moles
Converting Number of Particles to Moles 10.1 What is a Mole? Converting Number of Particles to Moles How many moles are in each of the following: 1. 5.75 x 1024 atoms Al
Converting Number of Particles to Moles 10.1 What is a Mole? Converting Number of Particles to Moles 2. 3.75 x 1024 molecules of CO2
Converting Number of Particles to Moles 10.1 What is a Mole? Converting Number of Particles to Moles 3. 3.58 x 1023 formula units ZnCl2
Converting Number of Particles to Moles 10.1 What is a Mole? Converting Number of Particles to Moles 4. 2.50 x 1020 atoms Fe
10.2
Converting Moles to Number of Particles 10.1 What is a Mole? Converting Moles to Number of Particles X unit of unknown = given x Conversion Factor conversion factor= 1 mole = 6.02 x 1023 Representative particles
Converting Moles to Number of Particles 10.1 What is a Mole? Converting Moles to Number of Particles Determine the number of atoms in 2.50 mol Zn.
Converting Moles to Number of Particles 10.1 What is a Mole? Converting Moles to Number of Particles Given 3.25 mol of AgNO3, determine the number of formula units.
Converting Moles to Number of Particles 10.1 What is a Mole? Converting Moles to Number of Particles 3. Calculate the number of molecules in 11.5 mol H2O
The Mass of a Mole of an Element 10.1 The Mass of a Mole of an Element The Mass of a Mole of an Element How is the atomic mass of an element related to the molar mass of an element?
The Mass of a Mole of an Element 10.1 The Mass of a Mole of an Element The atomic mass of an element is numerically equal to the molar mass of an element.
The Mass of a Mole of a Compound 10.1 The Mass of a Mole of a Compound The Mass of a Mole of a Compound How is the mass of a mole of a compound calculated?
The Mass of a Mole of a Compound 10.1 The Mass of a Mole of a Compound To calculate the molar mass of a compound, find the number of grams of each element in one mole of the compound. Then add the masses of the elements in the compound.
The Mass of a Mole of a Compound 10.1 The Mass of a Mole of a Compound Substitute the unit grams for atomic mass units. Thus 1 mol of SO3 has a mass of 80.1 g.
10.4
10.4
10.4
10.4
for Sample Problem 10.4 Problem Solving 10.7 Solve Problem 7 with the help of an interactive guided tutorial.
10.1 Section Quiz. 10.1.
10.1 Section Quiz. 1. Three common ways of measuring the amount of something are by count, by mass, and by temperature. by volume. by area. by density.
10.1 Section Quiz. 2. A mole of hydrogen gas, H2(g), contains 6.02 x 1023 molecules. atoms. amu. grams.
10.1 Section Quiz. 3. The atomic mass of fluorine is 19.0 amu, so the molar mass is 19.0 amu. 19.0 g. 6.02 x 1023 amu. 6.02 x 1023 g.
10.1 Section Quiz. 4. Calculate the molar mass of ammonium nitrate. 45.02 g 80.05 g 60.06 g 48.05 g
END OF SHOW