A volume of 50.0 mL of 0.625 M HBr neutralizes an 90.0mL sample of Ca(OH)2 solution. What is the molarity of Ca(OH)2? 2HBr(aq) + Ca(OH)2(aq) + 2H2O(I)

Which substance absorbs 58.16 kj of energy when 3.11 mol vaporizes? a)ch4 b)h2s c)co2 d)nacl

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)

Kc = 0.040 for the system below at 450oc. if a reaction is initiated with 0.40 mole of cl2 and 0.40 mole of pcl3 in a 2.0 liter container, what is the equilibrium concentration of cl2 in the same system? pcl5(g) ⇄ pcl3(g) + cl2(g)