Chemistry, 09.12.2019 18:31 jerrica988
Avoltaic cell consists of a strip of cadmium metal in a solution of cd(no3)2 in one beaker, and in the other beaker a platinum electrode is immersed in a nacl solution, with cl2 gas bubbled around the electrode. a salt bridge connects the two beakers. a. which electrode serves as the anode, and which as the cathode? i. cd serves as the cathode, ii. pt as the anode. iii. pt serves as the cathode, iv. cd as the anode. previous answers correct b. does the cd electrode gain or lose mass as the cell reaction proceeds? i. the cd electrode will lose mass as the cell reaction proceeds. ii. the cd electrode will gain mass as the cell reaction proceeds. previous answers correct c. write the equation for the overall cell reaction. express your answer as a chemical equation. identify all of the phases in your answer. d. what is the emf generated by the cell under standard conditions?
Answers: 2
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
Chemistry, 22.06.2019 13:00
The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false
Answers: 2
Chemistry, 22.06.2019 18:30
Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years
Answers: 2
Chemistry, 22.06.2019 19:40
Scientists have developed an explanation of a phenomenon from several verified hypotheses. the explanation has been confirmed through numerous experimental tests.which option best describes this explanation? a. scientific lawb. research questionc. hypothesisd. scientific theory
Answers: 3
Avoltaic cell consists of a strip of cadmium metal in a solution of cd(no3)2 in one beaker, and in t...
History, 03.02.2020 05:56
History, 03.02.2020 05:56
Mathematics, 03.02.2020 05:56
Chemistry, 03.02.2020 05:56
Mathematics, 03.02.2020 05:56
Mathematics, 03.02.2020 05:56
Physics, 03.02.2020 05:56
English, 03.02.2020 05:56
English, 03.02.2020 05:56
Mathematics, 03.02.2020 05:56
Mathematics, 03.02.2020 05:56