MODULE 2: Amount of Substance

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

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Front (Question)

What is a mole?

Back (Answer)

A unit of measurement that measures the number of particles in a substance

Front (Question)

What is the Avogadro’s constant?

Back (Answer)

That one mole has 6.02 x 10^23 particles

Front (Question)

What is the equation for moles?

Back (Answer)

moles = mass/mr

Front (Question)

What is molecular formula?

Back (Answer)

The number of atoms of each elements in a molecule

Front (Question)

What is empirical formula?

Back (Answer)

Simplest whole number ratio of atoms of each element in a compound

Front (Question)

What is a hydrated salt?

Back (Answer)

Salts with water molecules as a part of the crystalline structure

Front (Question)

What is an anhydrous salt?

Back (Answer)

Salts without water molecules as a part of the crystalline structure

Front (Question)

What is the equation for moles in gases?

Back (Answer)

moles = volume(dm3)/24

Front (Question)

What is the ideal gas equation?

Back (Answer)

PV = nRT

#10

Front (Question)

For the ideal gas equation, what does P stand for?

Back (Answer)

Pressure, Pa

#11

Front (Question)

For the ideal gas equation, what does V stand for?

Back (Answer)

Volume, m3

#12

Front (Question)

For the ideal gas equation, what does n stand for?

Back (Answer)

Moles, mol

#13

Front (Question)

For the ideal gas equation, what does R stand for?

Back (Answer)

Ideal gas constant, 8.31 Jmol -1 K -1

#14

Front (Question)

For the ideal gas equation, what does T stand for?

Back (Answer)

Temperature, Kelvin

#15

Front (Question)

How do you convert cm3 to m3?

Back (Answer)

x 10 ^-6

#16

Front (Question)

How do you convert dm3 to m3?

Back (Answer)

x 10 ^-3

#17

Front (Question)

How do you convert oC to K?

Back (Answer)

+ 273

#18

Front (Question)

How do you convert kPa to Pa?

Back (Answer)

x 10 ^3

#19

Front (Question)

What is stiochiometry?

Back (Answer)

Balancing numbers to give the amount of moles

#20

Front (Question)

What is the equation for percentage yield?

Back (Answer)

Percentage yield = actual yield / theoretical yield x 100

#21

Front (Question)

What are some of the reasons percentage yield may be less than 100%?

Back (Answer)

The reaction may not have gone to completion, other reactions may have taken place along side the main reaction, purifying the product

#22

Front (Question)

What is atom economy?

Back (Answer)

Atom economy is the efficiency of a chemical process in terms of all atoms involved and the desired products

#23

Front (Question)

What is the equation for atom economy?

Back (Answer)

Atom Economy = molar mass(es) of desired product(s) / molar mass(es) of all product(s) x 100

#24

Front (Question)

What aspects, other than a high atom economy, makes a reaction sustainable?

Back (Answer)

Using readily available/environmentally safe reactants, high percentage yield