What is a statement that summarize a pattern found in nature without attempting to explain

Name the element in group 17, period 2. (periodic table)

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.

Which of the following is a physical property flammability heat of combustion solubility and toxicity