1. which of the following is a physical change? a. breaking chemical bonds but not changing phase b. a change in phase but no change in molecular structure c. creating a new substance d: enters transfer and change in color 2. which of the following is an example of a chemical change a. mixing of paint colors b. formation of clouds c. metal corrading in salt water d, sugar dissolving in water

B. A change in phase but no change in molecular structure.

C. Metal corroding in salt water.

Explanation:

These are the examples that best correspond with the descriptions. In chemistry, it is important to distinguish between chemical and physical changes. A chemical change is one that produces a new substance. On the other hand, a physical change is one in which the material may change shape or form, but no chemical reactions occur and no new compounds are produced.

c8h10 is your answerr

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.