Parts of a tree is made into a table is that a physical or chemical change

Why do magnesium and oxygen combine?

The total number of protons and neutrons in the nucleus is called the

Which of the following Is true about semi-conductors -neither free eletrons nor hoes are considered charge carriers in a semi-conductor -exposing a crysal of a semiconductor to heat or light starts displacing valence electrons which then move

Which of the following is an example of a decomposition reaction? A) 4P + 5O - - > 2P2O5 B) CH4 + O2 - - > CO2 + 2H2O C) MnSO4 - - > MnO + SO3 D) Mg + 2HCl - - > MgCl2 + H2

Which term identifies the light areas of the moon? terrae regolith craters maria

What is the net ionic equation for the following reaction? H2CrO4 + Ba (OH) 2

How does improving food-storage facilities make farming more sustainable? A. It decreases the amount of water needed. B. It keeps food from rotting as quickly and being wasted. C. It decreases the amount of land needed. D.

Which of the following shows the correct net ionic equation for the reaction between HCl and NH3?

How would non secretion of of saliva effect digestion of food in the mouth.

Which of the following is insoluble in water? a." (NH) SO b. Na so c. Maso d. ZnSO e Baso