As a substance changes fees from gas to liquid to solid:

A - the spacing between molecules increased

B - it's density generally increases

C - the spacing between molecules is not affected

D - it undergoes a chemical change

A radioactive element is half disintegrated in 40 minutes. What is the time required for the decay of 75% of the element

Most of the fresh water that is available for human use cannot be seen A. True B. false

Amy is at basketball practice. She is about to shoot a free throw. When she releases the ball the ball will not have kinetic energy but will have potential energy. the ball will have kinetic energy but will not have potential energy.

What are 4 properties that krypton has?

Are ionic bonds more powerful or colvant? And why do molecular compounds not have crystal lattice?

Do organs of different species resemble each other?

Calculate the mass of grams of 14.79ml of a substance. It'd density is 1.193gml

The molecular weight of NaCl is 58.44 grams/mole. If you had a 1.0 molar solution (1.0 M), you would have to put 58.44 g of salt in 1.0 liter of solution. How many moles of NaCl would you have in 100 mL of this solution

Find an element from the halogen group and noble gases group and tell how it is used in everyday life.

Write the name of the following compound MgSO4 • H20