A pure substance made of one kind of atom

All of these may be classified as

A rigid tank whose volume is unknown is divided into two parts by a partition. one side of the tank contains an ideal gas at 927°c. the other side is evacuated and has a volume twice the size of the part containing the gas.

How do metal atoms bond with one another?

Connie was making sodium chloride by adding an acid to an alkali. She followed the progress of the reaction with a pH sensor. At which pH would she know that the acid and alkali had completely reacted to give a salt solution?

What is the dissociation equation for magnesium nitride?

What water activities might be easier to do in Lake Assal's salty water? What activities could be more difficult?

The suffix "-megaly in the term gastromegaly means:

The harder you strike a drum, the greater the sound's A) medium B) volume C) frequency D) pitch

The equation X + Y 2Z has the rate law equation shown below. Which of the following statements best describes the relationship of X on the rate of the reaction? rate = k[X]2[Y] Changing X has no effect on the reaction rate.

What moves in or out of a substance during a change of state?