Chemistry, 02.06.2021 20:30 janessa0804
g if 0.37 moles of r1 react with 0.28 moles of r2, which one is the limiting reactant? how many grams of the reactant in excess remain after the reaction is over? the molar mass of r1 is 56.0 g/mol. the molar mass of r2 is 32 g/mol
Answers: 3
Chemistry, 22.06.2019 11:00
3) in peaches, [oh]=3.16x10-11 m a) find [h+ ] b) what is the ph? c) is the solution acidic, basic, or neutral?
Answers: 1
Chemistry, 22.06.2019 11:40
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.)
Answers: 1
g if 0.37 moles of r1 react with 0.28 moles of r2, which one is the limiting reactant? how many gram...
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