16. Identify each of the following reactions as a synthesis, decomposition, or exchange reaction:
2Hg + O2 + 2HgO
Fe2+ + CuSO4 → FeSO4 + Cu2+
HCl + NaOH → NaCl + H2O
HNO3 → H+ + NO3-

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

How does the nervous system affect the excretory system?

Which factor that affects biodiversity?