DP Chemistry (first assessment 2025)

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Structure 1. Models of the particulate nature of matter » Structure 1.4—Counting particles by mass: The mole » Structure 1.4.2—Masses of atoms are compared on a scale relative to 12C and are expressed as relative atomic mass Ar and relative formula mass Mr . Determine relative formula masses Mr from relative atomic masses Ar .

Structure 1.4.2—Masses of atoms are compared on a scale relative to 12C and are expressed as relative atomic mass Ar and relative formula mass Mr . Determine relative formula masses Mr from relative atomic masses Ar .

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