Write the net ionic equation, including phases, that corresponds to the reaction Pb(ClO2)2 (aq) + Na, S(aq) + PbS(s) + 2 NaClO4(aq)

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

Quiz1. which physical state of nitrogen has the highest entropy? a solid© b gasoc liquid