Which of the following is true for the endothermic reaction ba(oh)2(aq) + nh4no3(aq) --> ba(no3)2(aq) + 2nh3(aq) + 2h2o(l)?
a: h> 0 s> 0
b: h< 0 s< 0
c: h> 0 s< 0
d: h< 0 s> 0

Particles vibrate in a rigid structure and do not move relative to their neighbors.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

Match each term to its description. match term definition excess reactant a) reactant that can produce a lesser amount of the product limiting reactant b) amount of product predicted to be produced by the given reactants theoretical yield c) reactant that can produce more of the product