How many moles are present in 2.3 x 1023 molecules of NH3?

In an investigation that uses the scientific method, which step immediately follows making a hypothesis? o summarizing the results o asking a question o making observations designing an experiment mark this and retum save and exit next submit

What is the percentage of hydrogen in nitrogen trihydride

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