Which of the following is a molecule and a element?

Ag2
NaCl
He
Li

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

Word equation for k(s) +h2o(l) yield koh (aq) + h2

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has: