Which of the following aqueous solutions has the lowest vapour pressure at 25 °C? (Sucrose is a non-electrolyte.)
0.025 mol kg-1 Ca(NO3)2
0.100 mol kg-1 CaSO4
0.075 mol kg-1 sucrose
0.050 mol kg-1 Naci
0.100 mol kg-1 KNO3

a. they are both space stations

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in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

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answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.