Why is toast a chemical change?

A student human a cell with a microscope observes a cell wall a cell membrane and a nucleus the presence of these structures indicates that the student is looking at a cell from a a. rabbit b. carrot c. worm d. Fly

The diagram is a representation of the electron sea model which statement best describes what is happening in this model? A. The electrons are floating to the top of the nuclei of metal atoms. B.

Why does magnesium fluoride conduct electricity when it is molten xx

Which of these is pure substance as well as a compound A. An atom of hydrogen B. A sample of oxygen gas C. Sample of carbon dioxide D. A solution of carbon dioxide dissolved in water

How many electrons can be contained in the second energy level? A. 2 B. 18 C. 10 D. 8

When heat is added to or removed from a substance, it may change its state. What state will most likely result if heat is added to a liquid?

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?