When a 1: 1 mixture of ethyl propanoate and ethyl acetate is treated with sodium ethoxide, four claisen condensation products are possible. draw the structure(s) of the product(s) that have a methyl group on the chiral center.

Its strengthits conductivity of heat and electricity its shiny colourmalleable and ductility

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

Use a magnet to separate iron, evaporate water, i'm not sure how to separate the other two i'm sorry but good luck