Indicate the number of each in the following:

a. orbitals in n = 2 principal energy level
b. sublevels in n = 4 principal energy level
c. orbitals in the 5f sublevel
d. orbitals in the 6p sublevel

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.

Select the correct lewis structure for fluorine which is group 7a element?

1.17 mol hcl and 2.5 mol naoh react according to the equation hcl + naoh -> nacl + h2o . if the limiting reactant is hcl, determine the amount of excess reactant that remains. answer in units of mol.