Part 2: Mole Calculations 1. How many moles of sodium carbonate are there in 53.6 grams of Na2CO3? 2. How many moles of each atom are there in 33.3 moles of Fe3(PO4)2? 3. How many molecules of dinitrogen tetroxide (N204) are there in 59 g of N204? 4. How many grams does one molecule of carbon monoxide (CO) weigh? 5. How many oxygen gas molecules do you need to make 25 g of water vapor (H₂O)? Balanced chemical equation:

Chemistry for Engineering Students
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ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter3: Molecules, Moles, And Chemical Equations
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How can we complete part 2? With moles
Workshop 9: The Mole
The mole is the unit of measurement for an amount in chemistry and physics. It is defined as the
amount of sample that contains as many items as there are atoms in 12 grams of carbon-12 (¹2C
isotope). The number of items in 1 mole is called the Avogadro's number:
NA = 6.022141 x 1023 1/mol
Mole in science, just like a dozen in our everyday life, allows us to quickly count or compare large
(huge!) quantities of items (microscopic objects). And since mole is just a number - you can have
a mole of anything - atoms, molecules, ions, electrons, photons, etc.
For any substance, the number of grams in 1 mole is the same as the number of atomic mass
units in the molecular weight of the substance. The molar mass (or molar weight) of a chemical
substance is defined as the mass in grams of 1 mole of that substance. The units for molar mass
are grams per mole - g/mol.
The mole provides a bridge between the atom and the macroscopic amounts of material that we
work with in the laboratory or in the industrial setting. For example, it allows chemists to
determine how many grams of each of the reactants are needed to produce a sought number of
grams of product.
Part 1: Discussion of mole and mass
Discuss these questions among your group members: think about water molecules (H₂0) and
sugar molecules (C12H22011) and try to predict the answers in the table below. Just predict - do
not use calculator.
Transcribed Image Text:Workshop 9: The Mole The mole is the unit of measurement for an amount in chemistry and physics. It is defined as the amount of sample that contains as many items as there are atoms in 12 grams of carbon-12 (¹2C isotope). The number of items in 1 mole is called the Avogadro's number: NA = 6.022141 x 1023 1/mol Mole in science, just like a dozen in our everyday life, allows us to quickly count or compare large (huge!) quantities of items (microscopic objects). And since mole is just a number - you can have a mole of anything - atoms, molecules, ions, electrons, photons, etc. For any substance, the number of grams in 1 mole is the same as the number of atomic mass units in the molecular weight of the substance. The molar mass (or molar weight) of a chemical substance is defined as the mass in grams of 1 mole of that substance. The units for molar mass are grams per mole - g/mol. The mole provides a bridge between the atom and the macroscopic amounts of material that we work with in the laboratory or in the industrial setting. For example, it allows chemists to determine how many grams of each of the reactants are needed to produce a sought number of grams of product. Part 1: Discussion of mole and mass Discuss these questions among your group members: think about water molecules (H₂0) and sugar molecules (C12H22011) and try to predict the answers in the table below. Just predict - do not use calculator.
Part 2: Mole Calculations
1. How many moles of sodium carbonate are there in 53.6 grams of Na2CO3?
2. How many moles of each atom are there in 33.3 moles of Fe3(PO4)2?
3. How many molecules of dinitrogen tetroxide (N204) are there in 59 g of N₂04?
4. How many grams does one molecule of carbon monoxide (CO) weigh?
5. How many oxygen gas molecules do you need to make 25 g of water vapor (H₂0)?
Balanced chemical equation:
Transcribed Image Text:Part 2: Mole Calculations 1. How many moles of sodium carbonate are there in 53.6 grams of Na2CO3? 2. How many moles of each atom are there in 33.3 moles of Fe3(PO4)2? 3. How many molecules of dinitrogen tetroxide (N204) are there in 59 g of N₂04? 4. How many grams does one molecule of carbon monoxide (CO) weigh? 5. How many oxygen gas molecules do you need to make 25 g of water vapor (H₂0)? Balanced chemical equation:
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ISBN:
9781337398909
Author:
Lawrence S. Brown, Tom Holme
Publisher:
Cengage Learning