Zn 2hcl → zncl2 h2 how many moles of hydrogen are produced from the reaction of 2.5 moles of zinc

An aqueous solution of hydroiodic acid is standardized by titration with a 0.186 m solution of calcium hydroxide. if 26.5 ml of base are required to neutralize 20.3 ml of the acid, what is the molarity of the hydroiodic acid solution? m hydroiodic acid

Often on a topographic map, every fifth contour line is darkened. what is this line called? a. key b.slope c.benchmark d. index contour

What substance has a mass of 9.5g and volume of 2.1cm^3