In the following list, only
is not an example of matter.

An observation that requires measurement is called quantitative observable or qualitative

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.

Describe the properties of sodium, chlorine, and sodium chloride