Astudent is given a small sample of a pure solid substance. she is asked to identify the substance based on a particular property. which property, if determined accurately, would best her identify the substance?

The student

identifies various ways

in which substances

differ (e.g., mass, volume, shape, density,

texture, and reaction

to temperature and

light).

Explanation:

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.