The cn– ion is widely used in the synthesis of organic compounds. what is the pattern of electron pairs in this ion? how many bonding pair(s) of electrons? how many lone pair(s) on the carbon atom? how many lone pair(s) on the nitrogen atom?

In which of these cases are the two wave points considered to be in phase with each other?

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.

11) burning your hand when accidentally touching a hot plate is an example of which heat transfer? a. conduction b. convection c. radiation d. none of these