Chapter 3- amount of substances Flashcards

1
Q

What is Avogadro’s Constant?

A

The number of atoms per mole of the carbon-12 isotope.

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2
Q

What is a mole?

A

The amount of any substance containing as many particles as there are particles in 12g of the carbon-12 isotope.

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3
Q

What is the equation for the number of moles of a substance?

A

n=m/Mr
n - number of moles (mol)
m - mass (g)
Mr - molar mass (g/mol)

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4
Q

What is molecular formula?

A

The number of atoms of each element in a molecule.

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5
Q

In hydrated salts, what is the name given to water molecules?

A

Waters of crystallisation

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6
Q

What is the concentration of a solute?

A

The amount of solute (in moles) dissolved in each 1dm^3 of solution

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7
Q

What is the equation for finding a solution’s concentration?

A

c=n/v
c - concentration (mol/dm^3)
n - number of moles (mol)
v - volume (dm^3)

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