9. How many moles of Ca are in 7.6 x 10^22 atoms of calcium?

There are 6.02×10²³ atoms of Ca in 1 mol of calcium, so:

6.02×10²³ --- 1 mol

7.6×10²² --- x

x = (7.6×10²²×1)/(6.02×10²³) = 0.13 mol

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.'