Given the following reaction: Sg(s) + 8 O2(g) → 8 SO2(g) AH = -2368 kJ (note-Sg is elemental sulfur)
How many moles of Sg are needed to produce the -2368 kJ shown?

Iknow the answer is a but i don't know why

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.