Select the properly written and balanced equation for the following chemical reaction: aqueous solutions of sodium hydroxide and iron (iii) nitrate react to produce a precipitate of iron (iii) hydroxide in an aqueous solution of sodium nitrate. 3naoh (aq) + fe(no3)3 (aq) arrow fe(oh)3 (s) + 3nano3 (aq) naoh (aq) + feno3 (aq) arrow feoh (s) + nano3 (aq) naoh (aq) + fe(no3)3 (aq) arrow feoh3 (s) + nano3 (aq) 3naoh (aq) + feno3 (aq) arrow feoh (s) + 3nano3 (aq)

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?

At 300 mm hg, a gas has a volume of 380 l, what is the volume at standard pressure

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.)