Chemistry, 04.12.2020 21:10, Alexistorres286
You have a 50.00 gram sample of a compound whose molecular weight is 180.156. On decomposition, the weights of the component elements are 20.00 grams of carbon, 3.36 grams of hydrogen, and 26.64 grams of oxygen. The molecular formula for the compound is C H O.
Answers: 1
Chemistry, 22.06.2019 11:40, Wemaybewrong
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) β h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 Β°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
Chemistry, 22.06.2019 23:00, genyjoannerubiera
In the reaction h2co3 (aq) + 3nh3 (aq) = 2 nh4+ (aq) + co3 2-, how many electrons are transferred?
Answers: 3
You have a 50.00 gram sample of a compound whose molecular weight is 180.156. On decomposition, the...
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