The test is detecting the gas through its reaction with lime water and the result so that the limewater will turn milky/cloudy
The salt is soluble to the water but the glucose aka sugar is not.
10ml of solute/100ml of solution *100% third one
The answer would have to be “move fast and far apart.”
I really hope this helps you.
density= mass/volume
we need the volume of the metal to find the density, in which case the answer would be 64.2/volume=density