Chapter 2 - Amount Of Substance Flashcards Preview

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Flashcards in Chapter 2 - Amount Of Substance Deck (12)
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1

What is the Avogadro constant?

The number of particles in one mole of anything. 6.022 x10²³

2

What is the molecular formula?

The molecular formula is the actual amount of each atom in a compound.

3

Define the term “empirical formula”

The simplest whole number ratio of the different atoms in a compound.

4

What is the relative formula mass of an atom?

The average mass of an atom compared to 1/12th the mass of a carbon 12 atom.

5

State the ideal gas equation.

pV = nRT

6

What is relative molecular mass?

The average mass of a molecule compared to 1/12th the mass of a carbon 12 atom.

7

What unit of temperature is required when using the ideal gas equation?

Kelvin

8

What units are used for volume when using the ideal gas equation?

9

What are the conversion units between cm³, dm³ and m³?

cm³ x10³ = dm³
dm³ x10³ = m³
Therefore...
cm³ x10⁶ = m³

10

How do you calculate mass using Mr (RFM) and moles?

Mass = Mr x moles

11

How do you calculate moles when given concentration and volume?

Moles = concentration x volume

12

How do you calculate atom economy?

(useful mass out/total mass in) x100