Which electrons are represented by all of the dots?

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.