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Chemistry Module 2 (Barbara) > Moles > Flashcards

Moles Flashcards

1
Q

1dm3 - cm3

A

X1000

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2
Q

1m3 - dm3

A

X1000

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3
Q

1cm3 - mm3

A

X1,000,000

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4
Q

1g - mg

A

X1000

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5
Q

1kg - g

A

X1000

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6
Q

1 tonne - kg

A

X1000

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7
Q

What is the definition of a mole?

A

The amount of substance that has the same number of particles as there are carbon atoms in exactly 12g of carbon 12.

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8
Q

What is the mass of one mole of a substance called?

A

Molar mass

Same as atomic number

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9
Q

What are the units of molar mass?

A

grams per mol

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10
Q

What are the 3 ways to find the moles?

A

mass/molar mass
volume/molar volume
concentration X volume

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11
Q

What is the molar volume?

A

24dm3 OR

24000cm3

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12
Q

What are the units of volume?

A

dm3

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13
Q

What are the units of concentration?

A

moldm-3

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14
Q

How do you work out the number of particles?

A

Moles X Avogadro’s constant

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15
Q

What is Avogadro’s constant?

A

6.02 X 10^23

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16
Q

How do you prepare a standard solution?

A

Place beaker on scales. Zero it.
Add 0.59g of salt into the beaker using spatular.
Add distilled water, stir with glass rod until salt has dissolved.
Add solution to volumetric flask using funnel.
Slowly add distilled water until bottom of meniscus is at 100cm3.
Put bung in and invert 15 times to mix.

17
Q

What is the empirical formula?

A

Simplest ratio of atoms of each element present in a compound

18
Q

How do you work out the empirical formula?

A

Work out number of moles of each element

Divide each by smallest one

19
Q

What is the molecular formula?

A

Number and type of atoms of each element in a molecule.

20
Q

How do you work out the number of water molecules in water of crystallisation calculations?

A

Moles of water/

Moles of anhydrous salt

21
Q

What is the ideal gas equation

A

pV=nRT

22
Q

What is pressure measured in the ideal gas equation?

A

Pascals

Pa

23
Q

What is volume measured in the ideal gas equation?

A

m3

24
Q

What is temperature measured in the ideal gas equation?

A

Kelvin

K

25
Q

What does R stand for in the ideal gas equation?

A

Ideal gas equation

26
Q

cm3-m3

A

X10^-6

27
Q

dm3-m3

A

X10^-3

28
Q

Degrees celsius - kelvin

A

+273

29
Q

KPa-Pa

A

X1000

Chemistry Module 2 (Barbara) (5 decks)

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