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Chemistry AS Level Unit 1 > Chemical Calculations > Flashcards

Chemical Calculations Flashcards

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1
Q

Relative atomic mass

A

Average mass of one atom of element relative to 1/12th mass of C12

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2
Q

Relative isotopic mass

A

Mass of a specific isotope of an element relative to mass of C12

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3
Q

Relative formula and molecular mass

A

Relative formula mass and molecular mass= sums of all atoms of all elements present in formula/molecule

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4
Q

Mass Spectrometer stages

A

Ionisation
Acceleration
Deflection
Detection

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5
Q

How mass spectrometer works

A

Gaseous sample introduced
Bombarded with electrons by electron gun (forms positive ions)
Acceleration chamber accelerates ions
Electromagnet crates magnetic field, deflects ions based on charge
Ions detected by detector

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6
Q

Percentage yield

A

Actual yield/theoretical yield x 100

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7
Q

Theoretical yield

A

Ar or Mr of desired substance/ Ar or Mr of substance used x 100

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8
Q

Atom economy definition

A

Percentage wastage

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Chemistry AS Level Unit 1 (5 decks)

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