How to tell a physical property and a chemical property? Someone help please I do not understand the differences and how to tell them apart

Adozen is 12, and your needing to calculate the weight of one medium egg, so i would do 21/12=1.75 per egg, and check your answer by doing 1.75 * 12= 21 : ) : ): ): ): ) i hoped i

Woah that’s a lot to read xd i’ll try though. i’ll get back t you if. i know the andwer