Which of the following choices represents a balanced chemical equation? ca3(po4)2 + 6sio2 → p4o10 + 3casio3 2ca3(po4)2 + 6sio2 → p4o10 + 6casio3 2ca3(po4)2 + 3sio2 → 2p4o10 + 2casio3 3ca3(po4)2 + 2sio2 → p4o10 + 4casio3

Complete the table for ion charge based upon their losing or gaining electrons in the outer shell. (use the periodic table as necessary.) group most likely ionic charge # of valence electrons i +1 ii +2 iii +3 iv +4 or -4 v -3 vi -2 vii -1 viii 0

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

Choose all the answers that apply. as ocean depth increases, temperature decreases temperature increases pressure increases pressure decreases salinity increases density increases