Two aqueous hydrogen bromide solutions containing 12.0 wt% hbr (sg 1.1377) and 65.0 wt% hbr (sg = 1.7613) are mixed to form a 4.27 molar hbr solution (sg 1.2340) = what feed rate of the 65.0 wt% hbr solution would be required to produce 1.10 x109 kg/hr of product? click to edit number l/hr what is the feed ratio of liters of 12.0 wt% hbr solution to liters of 65.0 wt% hbr solution?

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)