Diamonds are one of the hardest materials known. Hardness is how resistant a material is to being scratched by another material. If two samples of metal that appear identical
are scratched by a diamond, is that sufficient to determine that they are the same metal?
Why or why not?

Select the correct answer. which phrase correctly describes temperature? o a. average rotational kinetic energy of the particles in an object o b. average energy of the particles in an object c. average translational kinetic energy of the particles in an object od. all energy possessed by the particles in an object

How can you use chemical equations to predict the products of the reaction you can carry out?

What is the percentage of hydrogen in nitrogen trihydride