CHEMISTRY · Subjective · A Level · Chemistry · Amount of substance · Amount of substance
Problem
Without performing detailed arithmetic, rank the following three samples in order of decreasing number of molecules. Indicate any ties.
• 34 g O₂(g) (molar mass 32 g mol⁻¹)
• 44 g CO₂(g) (molar mass 44 g mol⁻¹)
• 18 g H₂O(l) (molar mass 18 g mol⁻¹)