Dojtnjnow What Unit Lol Flashcards

1
Q

Isotope definition

A

An atom of an element with the same number of protons, but a different number of neutrons.

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2
Q

What does atomic number show

A

Number of protons

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3
Q

What does mass number show

A

Neutrons + protons

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4
Q

Number of electrons in an atom

A

Equal to number of protons

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5
Q

Ion definition

A

An Atom of an element with the same number of protons but a different number of electrons

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6
Q

Relative atomic mass definition

A

The weighted mean mass of an atom of an element compared to the mass of 1/12 of a carbon-12 atom

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7
Q

Relative isotopic mass definition

A

The weighted mean mass of an isotope compared to the mass of 1/12 of a carbon-12 atom

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8
Q

Cl: 75% Cl-35, 25% Cl-37

A

(75 x 35) + (25 x 37)

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9
Q

Amount of substance unit

A

n

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10
Q

Avogadros number

A

6.02 x 10^23

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11
Q

One mole of atoms =

A

12g carbon-12

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12
Q

Molar mass volume defintion

A

The volume that one mole of a gas occupies at room temperature and pressure

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13
Q

Molar mass volume

A

24000cm3 / 24dm3

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14
Q

Molar mass =

A

m / n

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15
Q

Pv=

A

nRT

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16
Q

Room temperature

A

298k

17
Q

Room pressure

A

101kPa

18
Q

Pressure(Pa) x volume(m3) =

A

moles(n) x gas constant x temperature(k)

19
Q

Gas constant

A

8.314

20
Q

m3 to dm3

A

x1000

21
Q

m3 to cm3

A

x1000000

22
Q

Pa to kPa

A

/1000

23
Q

•C to K

A

+273

24
Q

Concentration =

A

Moles / volume

25
Q

Amount of gas at RTP =

A

Volume / Mr