One mole of aluminum atoms has a mass of 27 grams. How many grams are in 9.0 moles of aluminum?

What happens when the cold finger is placed in the hot water? what direction did the heat travel from the hot water?

What is the equation for determining the average atomic of an element

Elements in group 2 are classified as alkaline earth metals. what is most similar about the alkaline earth metals?

Why do you think lab safety is important?

A is a location in the model of an atom where the electrond are found.

Which of the following atoms releases more energy than oxygen when an electron is added to its valence energy level? Select one: a. helium (He) b. fluorine (F) c. carbon (C) d. nitrogen (N)

End-users of natural gas include (check all that apply) :

Angle of incidence and refraction for air at 0 degrees?

Which formula represents a solution? No explanation needed.

When electrons are removed from the outermost shell of a calcium atom, the atom becomes A) an anion that has a larger radius than the atom. B) an anion that has a smaller radius than the atom. C) a cation that has a larger radius than the atom.