Evidence of a chemical change includes?

A polymer coating of 6:0 mm thickness is cast onto a nonporous flat surface. The coating contains a residual amount of casting solvent, which is uniform at 1.0 wt% within the coating.

Specify the number of possible isomers of nitrobenzoic acid. Write the name of one of these isomers. Abbreviate ortho (o), meta (m) and para (p), no italics, if you elect to use these terms.

After learning about the law of conservation mass, Remy began to wonder about how to best test this law. She wanted to show that the amounts of matter did not change but produced an equal amount of a different kind of matter.

The human eye is a complex sensing device for visible light. The optic nerve needs a minimum of 2.0 * 10-17 J of energy to trigger a series of impulses that eventually reach the brain. How many photons of blue light (475 nm) are needed?

Which is not a physical property?

Why does every human measurement have uncertainty associated with it? Why must we manage the uncertainty during calculations?

Which two properties are used to define matter? has mass and conducts heat has buoyancy and volume has mass and takes up space conducts energy and has characteristic properties

Define the following liquid mixtures as suspensions or solutions: a. Water + benzoic acid: Suspension b. Water + sodium chloride: Solution c. Isopropanol + sucrose: Suspension

Consider the reaction 2H2S (g) ⇌2H2 (g) + S2 (g), Kp=2.4*10-4 (at 1073 K) A reaction mixture contains 0.111 atm of H2, 0.051 atm of S2, and 0.566 atm of H2S. Determine how these conditions compare to equilibrium conditions.

Where does Celsius boil