Which one of the following processes does NOT use Calcium? Group of answer choices

Component of thyroxine

Muscle contraction

Nervous impulses

Blood coagulation

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.

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

Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g.  what is the percent by mass of water in the hydrate?   %