Lithium nitride is an ionic compound. Nitrogen trifluoride is a covalent compound. Lithium nitride has a high melting point, 813 °C. Nitrogen trifluoride has a low melting point,
-207 °C why are the melting points are different.

Calculate the expected ph values of the buffer systems from the experiments (a, b,c, d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

The p sub shell can hold up to 8 electrons in an atom. true or false?

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