Many calculators use photocells to provide their energy. Find the maximum wavelength needed to remove an electron fromsilver (7.59X10⁻¹⁹J). Is silver a good choice for a photo-cell that uses visible light?

Q: (1) A metal that gets covered with a protective film of its oxide (Al, Cu, Ag)(2) A metal which…

A: 1) Aluminium metal gets covered with a thin protective layer of aluminium oxide.

Q: What If? Cadmium telluride (CdTe) has an energy gap at 300 K of 1.56 eV. What maximum wavelength of…

A: Given : E = 1.56 eV according to planck Einstein relation. E = hv h = 6.626 x 10-34 js = 4.136 x…

Q: 1. Briefly summarize the explanation of why the gas discharge tube glows when the high voltage is…

A: The gas discharge tube glows when the high voltage is applied because an electric field is created…

Q: Calculate the quantity of heat in kJ, associated with a 33.5oC decrease in temperature in: 1. A…

A: Given . Mass of aluminum ( m)   =  5.85 Kg                                          = 5.85 × 103…

Q: in meters) of an electromagneti

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Q: 1. Suppose there is an atom of oxygen, containing eight protons and eight neutrons in the nucleus,…

A: 1. An oxygen atom has eight protons and eight neutrons in the nucleus. Another four neutrons are…

Q: d) Give a comparison of heat capacity of silver, germanium and silicon as a function of temperature.

A: The heat capacity is a measure of the amount of heat necessary to raise the temperature of an object…

Q: 7. What are the properties of metals? O A. Have shiny lustre, various colours (although most are…

A:

Q: Molten metal often has a bright red/orange color to it, what phenomenon causes this? O Electrons can…

A: When electromagnetic radiation is emitted from a hot bodey due to high temperature then the…

Q: Compare and contrast electrolytic materials and metallic materials, and explain how each relates to…

A: Given: We have to describe the difference between electrolytic and metallic material.

Q: Which of the following paired statements are correct? A Prism --- serves as the source of radiation…

A: Prism will separate light into its component wavelengths. Light source serves as source of…

Q: The density of gold is 19.31 g/cm3. If the metallic radius of gold  is 407.9 pm, what is the…

A: Crystal  structure - The arrangement of atom, molecule of a crystal in the form of space lattice

Q: Ultraviolet light with a wavelength longer than about 284.6 nm has little germicidal value. What is…

A:

Q: Determine the mass of aluminum in an hour during its electrolytic production when the current that…

A:

Q: Which part in the figure can be a photovoltaic cell, phototube or photomultiplier tube? A O O O

A:

Q: What is the main element used in the manufacture of solar cells. Explain how additional elements are…

A: Silicon, the most common semiconductor material used in solar cells, representing approximately 95%…

Q: To make an electromagnet, which of the following should I wrap a coil of wire around? O a an empty…

A: Given answer of choices,   a. An empty tissue roll   b. A tall cylinder glass cup   c. A plastic…

Q: Which part in the figure can be a photovoltaic cell, phototube or photomultiplier tube?     A…

A: photovoltaic cell, phototube or photomultiplier tube are used as detector in spectrophotometer.

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: When a metal is heated its density decreases. There are two sources that give rise to this…

A: The answer is attached below-:

Q: The volume of a BCC cell is 2.6 x 10-25 m³. Determine the atomic radius in nanometers. O 2.764 nm O…

A: Given that : The unit cell is BCC Volume = a3 = 2.6×10-25 m3 where a= unit cell edge length r =…

Q: A synchrotron is an extremely powerful source of X-rays. The X-rays also can be geerated by…

A: Synchroton is powerful Source for generating xray.Xray are produced by high energy electron.

Q: MCQ 19: Group IV clement that acts as an insulator is A. Carbon (Diamond) B. Tin (Sn) C. Lead (Pb)…

A: The energy gap between valance band and conduction band determines wheather an element will conduct…

Q: If we need to replace mercury with any other material to find ionization potential then on which…

A: Mercury is used in the ionization potential determination because of its high vapor pressure and low…

Q: g) If the current efficiency is less then 100%, explain how unused current is lost during the…

A: In the electrowinning process, non-ferrous metals like Cu, Ag, Au, Ni, Zn, etc. are purified from…

Q: List the properties of copper that make it appropriate for electric wires?

A: Copper is a metal which is commonly used for making electric wires. This is because of the following…

Q: Which part in the figure can be a grating or prism? O A O B OD

A: Instruments for analyzing light and for determining the identity and structure of materials that…

Q: 4. Why metals are electrical conductors?

A: Metals are good electrical conductors.  because there are free held loose electrons are present in…

Q: 19 C9H7NO4 MW = 193

A:

Q: The Cesium ions has 8 Chlorine ions on its nearest neighbor, what is the coordination number of…

A: In this question, we will determine the coordination number of Cesium ion.  You can see the solution…

Q: 1. In an experiment, what volume of O, (g) at 0°C and 760 mmHg is produced when 5 A of current is…

A: Since your question has multiple parts, we will answer the first part for you. If you want residual…

Q: Which of the following is an example of an object that contains an electromagnet? a an umbrella a…

A: An electromagnet is a type of magnet in which the magnetic field is produced by an electric current.…

Q: What makes diamond one of the strongest materials known by scientists

A: Diamond is one of the hardest and strongest element present on earth . It is just because of…

Q: what are semi-conductors ? give examples.

A: Semiconductors are poorer electric conductors than metals but better conductors than non metals. Ex.…

Q: Consider a modification to the Hall-Heroult process for aluminum production, where we keep things…

A: Original process:

Q: Explain the Jahn-Teller effect and provide an example. (Inorganic Chemistry)

A: John- Teller effect :- The Jahn-Teller (J-T) theorem states that in molecules/ ions that have a…

Q: Why is it not possible to plate a metal spoon with aluminium using 1.0M Al(NO3)3 (aq)?

A: In aqueous solution, water and aluminum salt is present. When a metal spoon will be kept here that…

Q: B C Which part in the figure can be a grating or prism? A *中3中。 BC D * O O O O

A: Prism- An optical prism is a transparent optical element with flat, polished surfaces that are…

Q: What are semi-conductors? Give an example?

A: Semiconductors are poorer electric conductors than metals but better conductors than non metals.…

Q: Calculate the electron heat capacity at 1000 K in Na, Al and Cu metals using the following data: Na…

A: Electron heat capacity at 1000 K in Na = C=π 2 /2 ×n Kb (T/Tf )  According to data:…

Q: Differentiate AAS, AAS-Graphite, FES and ICP-MS

A:

Q: what is the best coating layer of nanoparticles used to coat the biomaterials alloys?

A: Coating is done primarily due to their long-term stability and excellent mechanical properties.…

Q: <p>List the properties of copper that make it appropriate for electric wires and the…

A: Copper is widely used in our daily lives for making electric wires and water pipes.This is because…

Q: II в D Which part in the figure can be a photovoltaic cell, phototube or photomultiplier tube? O A B

A: Photomultiplier tube- These are the sensitive detectors of light used for multiplication of…