Tin(IV) sulfide, SnS 2 , SnS2, a yellow pigment, can be produced using the following reaction. SnBr 4 ( aq ) + 2 Na 2 S ( aq ) ⟶ 4 NaBr ( aq ) + SnS 2 ( s ) SnBr4(aq)+2Na2S(aq)⟶4NaBr(aq)+SnS2( s) Suppose a student adds 38.5 mL 38.5 mL of a 0.450 M 0.450 M solution of SnBr 4 SnBr4 to 43.2 mL 43.2 mL of a 0.135 M 0.135 M solution of Na 2 S . Na2S. Identify the limiting reactant. a. NaBr b. SnBr4 c. SnS 2 d. Na2S Calculate the theoretical yield of SnS 2 . SnS2. theoretical yield: g g The student recovers 0.267 g 0.267 g of SnS 2 . SnS2. Calculate the percent yield of SnS 2 SnS2 that the student obtained. percent yield:

c is the answer because when something is left after something evaporates that shows the chemical change.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .