Oxygen atoms in water molecules from two different samples in an ice core were analysed

CHEMISTRY · Subjective · A Level · Chemistry · Atomic structure · Atomic structure

Problem

Oxygen atoms in water molecules from two different samples in an ice core were analysed.

isotope	Sample 1		Sample 2
	$^{16}\text{O}$	$^{18}\text{O}$	$^{16}\text{O}$	$^{18}\text{O}$
relative abundance / %	99.759	0.241	99.757	0.243

Determine the relative mass of oxygen in the two samples and identify which sample originated from higher historic temperatures.