Help me please
Can someone help me and explain how to find the configuration pleasee

Which of these best describes an ionic bond?

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.