A digital watch battery draws 0.20 milliamperes of current, which is provided by a mercury battery whose net reaction is: HgO(s) + Zn(s) ZnO(s) + Hg(l) If a partially used battery contains 2.20 g of each of these four substances, for how many hours will the watch continue to run? Submit Answer Tries 0/99

Q: Explain how electrical current and potential difference differ.

A: Differences between electrical current and potential difference: Electrical current is measured in…

Q: Determine the oxidation number of calcium hydrogen phosphate

A: The molecular formula of calcium hydrogen phosphate is CaHPO4. The oxidation state of calcium…

Q: rimarily composed of iron) pipe can be protected from corrosion by attaching to the pipe a strip of…

A: Silver forms an oxide layer around the steel. This can prevent steel from rust.

Q: : electric current flows from .A anode to cathode .B Cathode to anode .C through the electrolyte. .D…

A: In this question, we will see that in which direction electric current flow ( from anode to cathode…

Q: What is redox reaction and in what scenario it will occur?

A: Redox Reaction- Redox is a type of chemical reaction in which the oxidation states of atoms are…

Q: Identify the oxidation numbers for all the elements in the reactants and products for Ba²+ (aq) +…

A: we have to determine the oxidation numbers and calculate number of electrons transferred for the…

Q: of a galvanic cell is due to the difference in tendencies of the two metals to oxidize of of their…

A: Galvanic cells are comprised of a cathode and an anode chamber. In cathode, reduction reaction takes…

Q: Demi-réaction Au3+(aq) +3é → Au(s) C12(g) + 2é→ 2 CI (aq) Cu2+(aq) + 2e-→ Cu(s) 2 H+(aq) + 2e- →…

A:

Q: When does REDOX reaction happens?

A: A redox reaction is a type of chemical reaction that involves a transfer of electrons between two…

Q: Consider the following galvanic cell: Ag(s) | Ag*(3.0 × 104 M) || Fe³*(1.1 × 10³ M), Fe²*(0.040 M) |…

A: Given,

Q: 17 An electrolytic cell changes …………………. A. Electrical energy into heat energy   B. Chemical…

A: Answer :-  C. Electrical energy into chemical energy  . An electrolytic cell changes Electrical…

Q: How many coulombs of charge pass through a cell if 1.7 amperes of current are passed through the…

A:

Q: The amount of substance formed or consumed at the electrodes is proportional to the quantity of…

A: Faraday's  law -  It states that the induced  voltage  in circuit is proportional to the rate of…

Q: Why are some batteries called dry batteries?

A: Dry cells are those in which there is no use of water. One oxidizing agent and one reducing agent…

Q: What is the object overview be for rechargeable batteries

A:

Q: Balance the following reaction

A: The chemical reaction can be balanced by the law of mass action. The same Number of elements should…

Q: NO2 NH2 i) `NH2 `NH2 ii) NH2 НО. HO iii) 2 HS ОН NH2 NH2

A:

Q: The electrode potential of a metal is: a) The potential which exists at the interface between the…

A: Whenever any metal rod is dipped into solution of its ions then depending upon the magnitude of two…

Q: Which of the following statement is correct concerning a galvanic cell? A) The reduction…

A: The correct statement for this is attached below.

Q: What is the electrical potential required for the electrolysis of an aqueous solution of calcium…

A: The aqueous solution of Calcium Fluoride (CaF2) consists mainly of 3 species;  Ca2+,  F- and H2O…

Q: When a rechargeable battery is recharged,   it becomes a galvanic cell   extra electrons are being…

A:

Q: Describe with figure a process of power generation through chemical reactions.

A: Process of power generation through chemical reaction:

Q: What is an electrolytic cell?

A: Cell is a device which is used to draw current. It consists of two terminal ; positive and negative…

Q: Where are electrons received and donated at in a galvanic cell?

A: In galvanic cell electrons are produced at anode and moving towards cathode or electrons are donated…

Q: in analysis of copper, the cathode of hollow cathode lamp is a? -Zinc -Tungsten -Lead -Copper

A: Answer in analysis of copper, the cathode of hollow cathode lamp is…

Q: How many coulombs of charge pass through a cell if 1.9 amperes of current are passed through the…

A: Given: Cell current, I = 1.9 A Time, t = 20 min= 20 x 60 = 1200 sec Because 1 min = 60 sec Charge,…