To a 25.00 mL volumetric flask, a lab technician adds a 0.350 g sample of a weak monoprotic acid, HA , and dilutes to the mark with distilled water. The technician then titrates this weak acid solution with 0.0862 M KOH . She reaches the endpoint after adding 42.83 mL of the KOH solution. Determine the number of moles of the weak acid in the solution.

d. temperate deciduous forest

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

it's filtration, but this is an assumption so my apologies if i got this

lol for the pointsss