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GENCHEM > ATOMIC MASS AND MOLE CONCEPT > Flashcards

ATOMIC MASS AND MOLE CONCEPT Flashcards

1
Q

the mass of an atom of a chemical element expressed in _________

A

atomic mass units (amu)

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2
Q

approximately equivalent to the number of protons and neutrons in the atom (mass number)

A

ATOMIC MASS

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3
Q

ratio of the average mass of atoms of an element to 112th of the mass of an atom of carbon-12 (known as atomic mass unit (amu)

A

RELATIVE ATOMIC MASS

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4
Q

the sum of each isotope’s abundance in nature multiplied by its respective atomic mass

A

AVERAGE ATOMIC MASS

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5
Q

unit of measurement that enables atoms to be counted by their mass

A

MOLE (mol)

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6
Q

Avogadro’s Number

A

6.022 x 1023

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7
Q

Avogadro

A

Amedeo Avogadro

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8
Q

PARTICLES TO MOLE

A

1 mol / 6.022 x 10^23

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9
Q

MOLE TO MASS

A

molar mass / 1 mol

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10
Q

MASS (g) TO MOLE

A

1 mol / molar mass

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11
Q

MOLE TO PARTICLES

A

6.022 x 10^23 / 1 mol

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12
Q

It is the mass of the compound that is also known as the molecular mass or the formula weight

A

MOLAR MASS

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13
Q

It is the sum of all the atomic mass of all the atoms in a molecule

A

MOLAR MASS

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14
Q

This is the relative measure of the mass of each element found in a compound.
* It is calculated from a molecular formula by dividing the mass of a single element in one mole of a compound by the mass of one mole of the entire compound.

A

PERCENTAGE COMPOSITION

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15
Q

PERCENTAGE COMPOSITION formula

A

% mass of element = mass in grams of element / mass in grams of compound, all multiplied by 100

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16
Q
  • also known as simplest formula
  • the smallest whole number ratio of atoms present in a compound
A

EMPIRICAL FORMULA

17
Q

If the given is in PERCENT COMPOSITION, convert it to number of ____ of each element by assuming that you have 100 grams of the sample.

A

grams

18
Q
  • also known as true formula
  • it indicates the actual number of atom present in a molecule of a molecular substance
A

MOLECULAR FORMULA

GENCHEM (10 decks)

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