Unit Chemical Quantities: The Mole

Questions and Answers

How many moles are equal to 1.24x10^24 atoms of sulfur?

1.99 mol

How many atoms are equal to 1.5 moles of helium?

9.03x10^23 atoms

How many moles are equal to 4.15x10^23 molecules of carbon monoxide?

.69 mol

How many molecules are equal to 2.25 moles of sulfur dioxide?

1.35x10^22 molecules Signup and view all the answers

How many moles are equal to 2.4x10^23 formula units of sodium chloride?

.39 moles Signup and view all the answers

How many formula units are equal to 1.8 moles of magnesium iodide?

1.08x10^24 units Signup and view all the answers

How many moles are equal to 3.67x10^23 formula units of potassium permanganate?

.61 moles Signup and view all the answers

How many molecules of carbon tetrachloride are equal to 0.25 moles?

1.505x10^23 molecules Signup and view all the answers

How many moles are equal to 1.3x10^24 atoms of aluminum?

2.16 moles Signup and view all the answers

How many molecules are equal to 3.52 moles of oxygen difluoride?

2.12x10^24 molecules Signup and view all the answers

Study Notes

Mole Conversions

Moles measure the amount of substance, related to the number of atoms or molecules using Avogadro's number (6.02 x 10^23).

Calculating Moles from Atoms

1.24 x 10^24 atoms of sulfur equals approximately 1.99 moles.
To calculate moles, divide the number of atoms by Avogadro's number.

Calculating Atoms from Moles

1.5 moles of helium correspond to 9.03 x 10^23 atoms.
Total atoms can be found by multiplying moles by Avogadro's number.

Mole Calculations with Molecules

4.15 x 10^23 molecules of carbon monoxide equal about 0.69 moles.
Use the formula: Moles = Number of molecules / Avogadro's number.

Molecules from Moles

2.25 moles of sulfur dioxide yield approximately 1.35 x 10^22 molecules.
Multiplication of moles by Avogadro's number helps find total molecules.

Sodium Chloride Units

2.4 x 10^23 formula units of sodium chloride equate to roughly 0.39 moles.

Magnesium Iodide Calculations

1.8 moles of magnesium iodide corresponds to about 1.08 x 10^24 formula units.

Potassium Permanganate Moles

Approximately 0.61 moles result from 3.67 x 10^23 formula units of potassium permanganate.

Carbon Tetrachloride Molecules

0.25 moles of carbon tetrachloride equal approximately 1.505 x 10^23 molecules.

Aluminum Atom Calculations

1.3 x 10^24 atoms of aluminum translate to about 2.16 moles.

Oxygen Difluoride Molecule Count

3.52 moles of oxygen difluoride yield around 2.12 x 10^24 molecules.

Description

Test your understanding of chemical quantities with these flashcards focused on mole calculations. Each card presents a different scenario involving atoms and molecules, providing a hands-on way to learn about the mole concept. Perfect for students studying chemistry or preparing for exams.