Identify each of the following as either a physical change or a chemical change. Explain your answers.

A. a piece of wood is sawed in half.

B. milk turns sour.

C. melted butter solidifies in the refrigerator.

If a dilute agno3 solution is slowly added to the solution, what is the first compound to precipitate: ag2cro4 (ksp = 1.2*10-12), ag2co3 (ksp = 8.1*10-12), or agcl (ksp = 1.8*10-10) ?

This problem has been solved! See the answer A 2.5 g sample of french fries is placed in a calorimeter with 500.0 g of water at an initial temperature of 21°C. After combustion of the french fries the water has a temperature of 48°C.

A student hears in chemistry class that a certain object is made of a pure substance. What can the student conclude about the object based on this information?

One or more substances changing into one or more substances is an example of a

Why do the elements of the same group have similar properties?

If a sealed syringe that contains some gas in heated in which direction will the syringe plunger move

Use the drop‑down menus to label the statements as either true of false. Dichloromethane is flammable. true false Methanol is flammable. Concentrated sulfuric acid is corrosive. 10% sodium carbonate solution must be used in the fume hood.

What is the process all rocks are continuously in during which that can change into other types of rocks

Collagen is made of fibers and is found in tendons and cartilage. Collagen contributes to meat toughness and is, therefore, an example of which type of protein?

1. Why does CH30 evaporate faster than water?