C4.1/C4.2 - Relative mass and moles Flashcards

1
Q

Relative atomic mass

A

-aka Ar
-unit = grams
-masses of atoms compared by measuring Ar of carbon -12

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2
Q

Mr

A

-grams
-Ar of compounds

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3
Q

mole

A

-unit for amount of substance in Ar
-formula mass of substance
-grams

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4
Q

Avogardo’s constant

A
  • 6.022 x 10 to the power of 23
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5
Q

Equation involving moles/mass/Mr

A

moles = mass/Mr

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6
Q

Balanced symbol equations relation to moles

A

-tell you number of moles of substance in reaction

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7
Q

Avogadros constant refers to

A

Number of atoms per mole
Or in a compound number of molecules per mole

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8
Q

Number of atoms using avogadros constant

A

avogadros constant x amount of moles

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9
Q

Number of atoms in a compound in an amount of moles using avogadros constant

A

Molecules num = avogadros constant x amount

Ans x number of atoms in compound

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