Chemistry questions: which of the following is a reasonable ground-state electron configuration?

-1s21p62s22p63s2
-1s22s22p63s23p64s24d8
-1s22s22p63p6
-1s22s22p63s1

Which of the following two events occur to create a sea breeze? select all that apply. warm air rises on the ocean and moves toward the land to cool warm air rises on land and moves toward the ocean to cool cool air moves from the ocean to be warmed by the land cool air moves from the land to be warmed by the ocean

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.

Which symbol can be used to indicate the pressure at which a chemical reaction is carried out? 25°c 2 atm pa