What are semi-conductors? Give an example?

Q: Given the following standard reduction potentials:

A: To find the standard emf of a cell  Ecello  = ( Ered o)cathode  -( Eredo )anode    When two half…

Q: lead metal is dropped into an Erlenmeyer flask containing a solution of magnesium nitrite  a)…

A: A chemical equation is written in the symbolic form of the compound involved in a chemical reaction.…

Q: In the industrial "chlor-alkali" process, pure chlorine and sodium hydroxide are produced by…

A:

Q: Describe the process of Electrolysis of water?

A: Eleсtrоlysis  оf  wаter  is  the  рrосess  by  whiсh  wаter  is  deсоmроsed  intо  оxygenаnd…

Q: Determine the oxidation state for Magnesium Silicide, Mg2Si

A: Oxidation state of Mg2Si: The sum of oxidation numbers for neutral compounds must be 0.

Q: Explain how electrical current and potential difference differ.

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

Q: What are the main principles of ?converting cast iron to steel

A: Ore is a mineral from which the metals are conveniently extracted in a profitable way. For example,…

Q: general background of aluminium.

A: There are in total 118 elements in chemistry. Aluminium is one of them which is very useful in our…

Q: The oxidation number of Na in Na₂SO is:

A:

Q: calculate the % composition of the compound

A: Given :- mass of barium silicide = 73.16 g                mass of Barium = 33.62 g  To determine :-…

Q: What unit is used to measure the magnitude of electrical current? What unit is used to measure the…

A: The unit used to measure the magnitude of electrical current is Amperes.The unit used to measure the…

Q: Metals have properties that can be used for various applications. Determine the property of metals…

A: Metal electrodes have been found to carry the highest number of ions; thus,  pure metal is the most…

Q: Is Cupric acetate a metal? why or why not?

A:

Q: Which metal can be added to steel to form an alloy, which is resistant to corrosion, known as…

A: Stainless steel is the steel which is resistant towards corrosion. It contains approximately 10.5%…

Q: 1. Write a short description about the physical and chemical properties of a copper at standard…

A:

Q: How do the conductivity of electrolyte solutions and metals change with temperature?

A: The dependence of temperature of electrolytic solution and metals is discussed below:

Q: Which of the following substances will conduct electricity in both of its molten and solid states?…

A: As we know,  electricity is conducts due to free electrons and free ions   Sn is the element which…

Q: Use a table of Standard Potentials to answer the following questions: The standard reduction…

A: We would use standard reduction potential table to answer these questions.    Note : As you have…

Q: 1 A sample of a Fe2+ solution requires 26 mL of 0.0200 M K2Cr2O7 for a reaction  in which Fe2+ is…

A: Normality and molarity are two unit of concentration. Here we required to find the  normality of…

Q: What is the process of Electrorefining and the process of Electroplating

A: The process of electrolysis is used to reduce the metals from minerals. The process is known as…

Q: What unit is used to measure the magnitude of electrical current?

A: Rate of flow of charge is known as current.

Q: Suppose 630. mmol of electrons must be transported from one side of an electrochemical cell to…

A: The given problem can be solved by using the formula given below as; Current I = Charge qtime t…

Q: A constant current of 90 mA is passed for 22 minutes into an electrolysis cell. How much electrical…

A: Charge passing per unit time is known as  electric current.

Q: Explain why diamonds are useful for electrodes in batteries

A: Diamonds are useful for electrodes in batteries due to the listed reason:

Q: Compared to pure metals, alloys are ...

A: ALLOY IS A MIXTURE OF TWO OR MORE ELEMENTS WITH CERTAIN  FIXED COMPOSITIONS MAJOR COMPONENT IS…

Q: Why mercury cell gives the constant voltage.

A: Mercury cell is electro chemical cell and  we use a electrolyte KOH  in this cell because it happend…

Q: Describe the process of Electrolysis?

A: Decomposition of electrolyte on passing electricity through its molten state or aqueous solution.…

Q: What is electrode potential?

A: Electrode potential is to be defined.

Q: How much weight of silver iodide deposit can be obtained from 0.073 g magnesium iodide?

A: Molar mass: It is the mass expressed in grams of 1 mole of a substance. It is specific for a given…

Q: Suppose 0.680 mols of electrons must be transported from one side of an electrochemical cell to…

A: The relation between current, charge and time is given by the Ohm’s law according to which the…

Q: Balance the equation and determine the reaction. 222 Rn -> Не 86

A:

Q: 4. Which of the following ageos solui ons is the best conducer d electricity? A Q10M CH,OH R LOM…

A: some tips - concentrated solution give more conductivity than the Diluted one as the number of ions…

Q: Suppose 0.880 mol of electrons must be transported from one side of an electrochemical cell to…

A: Electric current is defined as the charge flown per unit time. I= Qt Where Q= Charge in coulomb t=…

Q: Using your own words, Discuss the difference between Alloys and composite materials

A: Mixtures are combinations of two or more substances in which each substance retains its chemical…

Q: Which of these is a property of metals?

A: Metals :-  These are minerals which are isolated from the earth crust in the form of alloy ( mixture…

Q: the three solutions lištéd in the crical conductivity and why? Solution 1 M HC,H3O2(aq) 1 M KI(aq) 1…

A: Electrical conductivity depends on 1.number of ions  2. Mobility of ions. 3. Size and viscosity of…

Q: 2. What is the effect of the nature of solvent on the electrical conductivity of solutions?

A: Conductivity in an electrolytic solution is due to movement of ions. More the ions more the…

Q: Define and compare the terms conductive, insulating, and semi-conductive.

A: To define any element whether it is conductive , insulating and semi-conductive in nature there…

Q: 9. Assume that you have these materials: a) Li (s); b) Br2 (1); Ge (s) and d) Si(s). Choose the best…

A: Metals are good conductors because of presence  of free electrons.

Q: 22 ent, when present in large amounts, causes steel to become brittle and unworkable:

A:

Q: A baby’s spoon with a surface area of 6.25 cm2 is plated with silver from AgNO3 using a current of 2…

A: The basis of electrolytic cells is the conversion of electrical energy to chemical energy. Any…

Q: Suppose 830. mmol of electrons must be transported from one side of an electrochemical cell to…

A: We have to transport electron from one side to another side, using current flow. We are given ;…

Q: Write a summary about the metal calcuim phosphate is derived.

A: Calcium phosphates are strong white nutrients and are found in many living things, e.g., mineral…

Q: Obtain the oxidation number for the Cu in Cuo. O-2 O+2 O+1 O-1

A: Please find your solution below : Oxidation number of an atom in a compound or molecule is defined…

Q: Would you expect a mercury cell to give a constant voltage and why?

A: Yes, mercury cell provides a constant voltage throughout life. This is because there are no ions…

Q: Electrolysis is also used to plate metals onto other metals. True or false? Give an example?

A: Electrolysis is also used to plate metals onto other metals. It is true.