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Questions and Answers
Which type of compound is formula mass typically used for?
Which type of compound is formula mass typically used for?
- Ionic compounds (correct)
- Organic compounds
- Molecules
- Acids
The formula mass of a substance is numerically equal to its molar mass expressed in grams per mole.
The formula mass of a substance is numerically equal to its molar mass expressed in grams per mole.
True (A)
What is the common name for the ionic compound NaCl?
What is the common name for the ionic compound NaCl?
Table salt
Molecular mass is used for compounds that exist as ______.
Molecular mass is used for compounds that exist as ______.
Match the following compounds with their common names:
Match the following compounds with their common names:
What conversion factor is used to convert between moles and the number of atoms, molecules, or ions?
What conversion factor is used to convert between moles and the number of atoms, molecules, or ions?
To calculate number of atoms from mass, you should directly convert grams to atoms.
To calculate number of atoms from mass, you should directly convert grams to atoms.
What is the molar mass of Zinc ($Zn$)?
What is the molar mass of Zinc ($Zn$)?
What is the amount of substance containing the same number of particles called?
What is the amount of substance containing the same number of particles called?
One mole of any substance contains $6.02 \times 10^{23}$ particles.
One mole of any substance contains $6.02 \times 10^{23}$ particles.
What is the molar mass of a compound numerically equal to?
What is the molar mass of a compound numerically equal to?
The molar mass unit is ______.
The molar mass unit is ______.
If you have 1 mole of NaCl, how many $Na^+$ cations do you have?
If you have 1 mole of NaCl, how many $Na^+$ cations do you have?
The number of atoms in 1 mol of carbon is equal to the number of molecules in 1 mol of water
The number of atoms in 1 mol of carbon is equal to the number of molecules in 1 mol of water
Match the following terms with their definitions:
Match the following terms with their definitions:
What information is needed to calculate the molar mass of a compound?
What information is needed to calculate the molar mass of a compound?
What conversion factors are needed to determine the number of molecules in 0.334 g of $NH_3$?
What conversion factors are needed to determine the number of molecules in 0.334 g of $NH_3$?
To convert from grams of a substance to moles, you should multiply by the molar mass of the substance.
To convert from grams of a substance to moles, you should multiply by the molar mass of the substance.
What is the molar mass of ammonium nitrate ($NH_4NO_3$)?
What is the molar mass of ammonium nitrate ($NH_4NO_3$)?
Avogadro's number represents the number of ______ in one mole of a substance.
Avogadro's number represents the number of ______ in one mole of a substance.
What is the mass of copper present in 3.87 mol of copper?
What is the mass of copper present in 3.87 mol of copper?
Copper is used for the absorption of iron and concerned with the formation of hemoglobin.
Copper is used for the absorption of iron and concerned with the formation of hemoglobin.
What conversion factor is used to convert moles of $NH_4NO_3$ to grams of $NH_4NO_3$?
What conversion factor is used to convert moles of $NH_4NO_3$ to grams of $NH_4NO_3$?
Match the following substances with their application:
Match the following substances with their application:
Flashcards
Mole
Mole
A mole is the amount of substance containing 6.02 × 10²³ particles.
Avogadro’s Number
Avogadro’s Number
Avogadro's number, 6.02 × 10²³, is the number of particles in one mole.
Molar Mass
Molar Mass
Molar mass is the mass in grams of one mole of a substance.
Atomic Mass to Grams
Atomic Mass to Grams
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Molecules in a Mole
Molecules in a Mole
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Ionic Compounds in a Mole
Ionic Compounds in a Mole
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Calculating Molar Mass
Calculating Molar Mass
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Mass Calculations
Mass Calculations
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Formula Mass
Formula Mass
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Molecular Mass
Molecular Mass
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Avogadro's Number
Avogadro's Number
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Conversion Factor
Conversion Factor
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Calculation Process
Calculation Process
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Zinc Atom Calculation
Zinc Atom Calculation
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Molecules in Ammonia
Molecules in Ammonia
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Molar mass of NH3
Molar mass of NH3
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Molecules in NH3
Molecules in NH3
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Conversion from grams to moles (NH3)
Conversion from grams to moles (NH3)
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Calculating molecules from grams (NH3)
Calculating molecules from grams (NH3)
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Molar mass of NH4NO3
Molar mass of NH4NO3
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Moles from grams (NH4NO3)
Moles from grams (NH4NO3)
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Molar mass of Cu
Molar mass of Cu
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Calculating mass from moles (Cu)
Calculating mass from moles (Cu)
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Study Notes
Mole Concept
- A mole (mol) is the amount of a substance containing the same number of particles
- One mole of anything is equivalent to Avogadro's number, 6.02 × 1023
- Avogadro's number is named after the Italian scientist Amadeo Avogadro
- One mole of an element is numerically equal to its atomic mass in grams
- For example, 1 mol of Carbon (C) = 12 g
- One mole of an element has 6.02 × 1023 atoms
- For example, 1 mol of Aluminum (Al) = 6.02 × 1023 Al atoms
- One mole of a molecular compound contains 6.02 × 1023 molecules
- For example, 1 mol of Water (H2O) = 6.02 × 1023 H2O molecules
- One mole of an ionic compound contains 6.02 × 1023 cations and 6.02 × 1023 anions
- For example, 1 mol of Sodium Chloride (NaCl) = 6.02 × 1023 Na+ and 6.02 × 1023 Cl−
Molar Mass
- Molar mass is the mass in grams of one mole of a substance
- It is numerically equal to the sum of the masses of the atoms in the substance
- It is calculated by multiplying the number of atoms of each element by the atomic mass of that element, and then summing these values
- The unit is g/mol
- Example: Galactose (C6H12O6) has a molar mass of 180 g/mol
Formula Mass & Molecular Mass
- Formula mass is used for ionic compounds
- It is expressed in amu or u
- It is numerically equal to the molar mass expressed in grams per mole of a substance
- Molecular mass is used for molecular compounds
- It is expressed in amu or u
- It is numerically equal to the molar mass expressed in grams per mole of a substance
Calculations Involving Formulas
- Conversion Factors: Avogadro's number (6.02 × 1023) relates moles to the number of particles (atoms, molecules, or ions). Molar mass relates moles to mass.
- Example Calculations: Using these conversion factors, you can calculate the number of atoms in a given mass of an element, the number of molecules in a given mass of a compound, the mass of a given number of molecules, and more.
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