Which process results in a chemical change?

(1) tearing tin foil

(2) melting an iron bar

(3) crushing an aluminum can

(4) burning magnesium ribbon

What are protons and neutrons

Why does a permeable rock weather chemically at a fast rate?

Which describes a characteristic of a terminal moraine? A. It can cause sediment to be deposited in sandy ridges. B. It can create a group of teardrop-shaped hills. C.

How much of a sample remains after three half-lives have occurred? 1/16 of the original sample 119 of the original sample 1/8 of the original sample 1/3 of the original sample

Is freezing water a physical or chemical change

Chemical Reactions Lab Procedures: 1. Place a 1cm long piece of white chalk in a clear plastic cup. 2. Add 5 mL of vinegar to the cup. 3. Record your observations. If you were performing the procedures above you would need to A.

How many moles of oxygen are in 0.53 moles of co 22?

The car wit fastest acceleration is the tempest. it has an acceleration of 6.1 m/s. suppose the car accelerates from rest to a final speed of 30. m/s. how long does it take the tempest to reach this speed?

What is the wavelength of 2.18*1016 hz wave?

Which of the following summarizes photosynthesis? A. glucose + carbon dioxide → oxygen + water B. carbon dioxide + water → glucose + oxygen + water C. oxygen + water → glucose + carbon dioxide + water D.