Which of the following laboratory procedures best illustrates the law of conservation of mass? (Assume the product of the reaction includes the mass of any unused reactants.) (3 points) a Recording the rise in water level when a 25 g piece of wood is placed in 200 mL of water b Synthesizing 36 g of H2O by combining 4 g of H2 and 32 g of O2 c Heating 32 g of S and 56 g of Fe to form 80 g of FeS d Measuring precisely 0.495 g of sulfur powder

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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the correct answer is:

a. formation of precipitation

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