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Questions and Answers
Which is the molar mass of H2O?
Which is the molar mass of H2O?
18.02 g/mol
What is the molar mass of CHCl3?
What is the molar mass of CHCl3?
119.37 g/mol
Which best compares 1 mol of sodium chloride to 1 mol of aluminum chloride?
Which best compares 1 mol of sodium chloride to 1 mol of aluminum chloride?
Both are made up of 6.02 x 10^23 formula units.
Which is the formula mass of (NH4)2SO4?
Which is the formula mass of (NH4)2SO4?
What is the molar mass of a substance?
What is the molar mass of a substance?
How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen?
How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen?
Which value gives the number of particles in 1 mol of a substance?
Which value gives the number of particles in 1 mol of a substance?
What is the molar mass of Al2(SO4)3?
What is the molar mass of Al2(SO4)3?
How are a mole and a dozen similar?
How are a mole and a dozen similar?
Which statement best describes a mole?
Which statement best describes a mole?
The mole concept will most likely be used in?
The mole concept will most likely be used in?
Magnesium and iron are metallic elements. How does a mole of magnesium compare with a mole of iron?
Magnesium and iron are metallic elements. How does a mole of magnesium compare with a mole of iron?
In a classroom, which comparison would a teacher most likely use for describing a mole?
In a classroom, which comparison would a teacher most likely use for describing a mole?
Which is the molar mass of BF3?
Which is the molar mass of BF3?
Flashcards
Molar Mass
Molar Mass
The mass in grams of one mole of a substance.
Formula Mass
Formula Mass
The sum of the atomic masses of all atoms in a chemical formula.
Mole
Mole
A unit of measurement that represents 6.02 x 10^23 particles of a substance.
Avogadro's Number
Avogadro's Number
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How many particles are in 1 mole?
How many particles are in 1 mole?
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What defines the molar mass of a substance?
What defines the molar mass of a substance?
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How does a mole of one substance compare to a mole of another?
How does a mole of one substance compare to a mole of another?
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How does the number of molecules in 1 mole of O2 compare to 1 mole of N2?
How does the number of molecules in 1 mole of O2 compare to 1 mole of N2?
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What is the molar mass of H2O?
What is the molar mass of H2O?
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What is the molar mass of CHCl3?
What is the molar mass of CHCl3?
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What is the molar mass of Al2(SO4)3?
What is the molar mass of Al2(SO4)3?
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What is the formula mass of (NH4)2SO4?
What is the formula mass of (NH4)2SO4?
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How are a mole and a dozen similar?
How are a mole and a dozen similar?
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What is the molar mass of BF3?
What is the molar mass of BF3?
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Study Notes
Molar Mass Calculations
- Molar mass of water (H2O) is 18.02 g/mol.
- Molar mass of chloroform (CHCl3) is 119.37 g/mol.
- Molar mass of aluminum sulfate, (NH4)2SO4, is 132.17 amu.
- Molar mass of aluminum sulfate, Al2(SO4)3, is 342.17 g/mol.
- Molar mass of boron trifluoride (BF3) is 67.81 g/mol.
Mole Concept
- A mole contains 6.02 x 10^23 particles, known as Avogadro's number.
- One mole of sodium chloride (NaCl) and one mole of aluminum chloride (AlCl3) both consist of 6.02 x 10^23 formula units.
- Comparing a mole of magnesium to a mole of iron reveals that both have identical numbers of atoms.
Comparing Substances
- The number of molecules in 1 mole of oxygen (O2) is equal to the number of molecules in 1 mole of nitrogen (N2).
- A mole and a dozen share the similarity of each denoting a specific count of objects, such as eggs or jellybeans.
Application of Mole Concept
- The mole concept is useful for quantifying atmospheric ozone molecule loss.
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Description
Test your knowledge of molar masses with these flashcards! Each card presents a question regarding the molar mass of different compounds or comparisons between them. Perfect for Chemistry 2 students preparing for exams.
