Agas cylinder contains exactly 15 moles of oxygen gas (o2). how many molecules of oxygen are in the cylinder?

no, i was listening to water by schoolboy q while and i saw this question

explenation:

water isn't wet. wetness is a description of our experience of water; what happens to us when we come into contact with water in such a way that it impinges on our state of being. we, or our possessions, 'get wet'. a less impinging sense experience of water is that it is cold or warm, while visual experience tells us that it is green or blue or muddy or fast-flowing. we learn by experience that a sensation of wetness is associated with water: 'there must be a leak/i must have sat in something.'

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)