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

Agas in a balloon at constant pressure has a volume of 160 ml at -125*c. what is its volume at 29.0*c?

Given that 1 mi = 1760 yd, determine what conver- sion factor is appropriate to convert 1849 yd to miles; to convert 2.781 mi to yards.

Some liquids can be distilled, but only at temperatures that are so high that it is impractical, or so high the compound decomposes. explain why distillation such compounds at significantly less than atmospheric pressure (some degree of vacuum) would solve this problem.