If 55 g of SiO2  glass is placed into 111 L of 0.032 M HF, is there enough HF to dissolve all of the glass? Determine which substance is the limiting reagent and calculate how much of the other reagent is left if the reaction proceeds to completion.

Q: Which of the following alloys does not contain copper?           (A) Bronze          (B) Pewter…

A: Bronze = copper + tin  Pewter = Tin + antimony + copper  Sterling silver = silver + usually copper

Q: In the pyroxene kanoite, the formula unit has two SiO,2 units and is balanced by manganese and…

A: The name of the given compound is kanoite. It is made up of two SiO32-anions and Mg2+ and Mn2+ as…

Q: >Why does BN form compounds similar to those formed by elemental carbon?

A: The boron nitride consists of BN units, which have same number of electrons (isoelectronic) as that…

Q: At STP conditions, identify the phase under which carbon dioxide exists

A: STP Is known as standard temperature and pressure. Standard pressure is 1 atm and temperature is 273…

Q: Calculate the composition, in weight percent, of an alloy that contains 218.0 kg titanium, 14.6 kg…

A: Given: Mass of titanium = 218.0 Kg Mass of aluminium = 14.6 Kg And mass of vanadium = 9.7 Kg.

Q: Explain how homogeneous and heterogeneous alloys differ. Describe the differences between…

A: An alloy is a uniform mixture. It is made up of two or more chemical elements, of which at least one…

Q: How does adding water to the NaCl and SiO2 separate the two substances? What physical property is…

A: Filtration and distillation are physical separation methods that are based on the difference in…

Q: What are alumino silicates or FELDSPARS

A: The metallic compounds which are found in nature, called as minerals whereas the minerals which can…

Q: What volume of acetylene can be obtained from the 36 grams of Calcium Carbide under standard…

A: Given data: Mass of Calcium carbide = 36 g Formula used: P V = n R T

Q: Impurities of copper, bismuth, lead in the silver nitrate drug are determined with one reagent: A)…

A:

Q: Differentiate the properties of carbon filter,  ceramics, and micro alloys

A: The properties of carbon filters,  ceramics, and micro alloys are differentiated below.

Q: Compare and contrast the two types of metal alloys.

A: Two types of alloys,    Substitutional alloy    Interstitial alloy

Q: Sketch the silicon–oxygen tetrahedron and explain how these fundamental building blocks join…

A: Complexions [SiO4]4- having a net charge of -4, to become electrically balanced, these complexions…

Q: What are some advantages and disadvantages of vitreous silica and soda-lime glass?

A: Vitreous silica is made from silica which is converted to glass. Soda lime in addition of silica…

Q: of KClO3 that decomposed.

A: Volume of oxygen = 52.4 mL  = 52.4/1000  = 0.0524.L Pressure of Oxygen = 765.2-22.6   = 742.6 mm Hg…

Q: Draw a structure consisting of SiO4 units arranged in a chain with each unit sharing two of its…

A: Silicates are compounds of silicon and oxygen with a basic unit of  [SiO44-] Silicates are of…

Q: 16 - Which of the following is not correct for Limestone? A) Lime production is obtained in 2 ways…

A: A multiple choice question based on limestone, which is to be accomplished.

Q: Describe what happens on the molecular level when silica is heated and then cooled to make glass.

A: The general formula of silica is SiO2 which melts on heating above 1500oC.

Q: You have a mixture of KCI, BaCO3, and SiO2, From the following, select the steps that would allow…

A: Answer: Among the given 3 compounds, KCl, BaCO3, and SiO2, the compound KCl is water-soluble and…

Q: What are some of the structural differences between quartz and amorphous SiO2?

A: A question based on solid state, which is to be accomplished.

Q: Describe the mechanism by which cement hardens when water is added.

A: Cement is binder substance used in construction of buildings. It is generally gray color substance.

Q: Write the different types of alloys?

A:

Q: 1. Explain the magnetic properties of Mno Zno 2Fe;O, based ferrite on its structure.

A: Magnetic properties: The Magnetic properties (introductory penetrability and relative misfortune…

Q: Chemical name of the gas evolved when hydrogen fluoride is made to react with silica.

A: Since you have posted multiple questions, the answer for first question is given below. Kindly…

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 does silica operate at highly temperature

A: Silica is widely used in industry. Since it can withstand high temperature.

Q: What are Silicate Ceramics? Give some examples?

A:

Q: what is the appropriate way of preparing hypochlorite solution?

A: Sodium hypochlorite has a molecular formula NaOCl comprising of Na+ion and hypochlorite ion (ClO- ).…

Q: What are silicates? What is quartz?

A:

Q: How sodium is used for extraction of silicon and boron?

A: Extraction of silicon:Silicon dioxide is extracted from waste colored glasses by alkali using sodium…

Q: Specify clearly the three different principle ways by which impurities can be present in a…

A: A question based on analytical process that is to be accomplished.

Q: 1. What is the difference in melting characteristics between a pure metal element and an alloy…

A:

Q: 9. Amorphous silica, SiO2, has a density of about 2.2 g/cm³, whereas the density of crystalline…

A: Answer - The amorphous material has less density then the crystalline material because the amorphous…

Q: how many grams of calcium phosphate can be produced from the reaction of 3.0 L of 0.230 M calcium…

A: Moles of CaCl2 = molarity x volume of solution                          = 0.230 x 3.0…

Q: a) Calculate the composition, in weight percent, of an alloy that contains 218.0 kg titanium, 14.6…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Describe the difference between vitreous silica and soda-lime glass. What are some advantages and…

A: Vitreous silica is made from silica which is converted to glass. Soda lime in addition of silica…

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: >Explain why metals such as Au and Ag are found in their elemental states in nature, but metals…

A: Given,Metals such as Au and Ag are found in their elemental states in nature, but metals like Na and…

Q: Iron-Cement (Fe-Fe3C) Draw the phase diagram, show the reactions and temperatures on the graph and…

A:

Q: What volume of hydrogen (STP) is produced by dissolving 1.2 moles of aluminum in sulfuric acid? 2…

A: The given reaction is expressed as, 2Als+3H2SO4→Al2SO43+3H2......(1) The number of moles of aluminum…

Q: a sample of KClO3 (Mw = 122.55 g/mol) allowed to decompose in presence of MnO2. The resulting oxygen…

A: Given that, A sample of KClO3 decomposed in presence of MnO2. The chemical equation as follows ---…

Q: What volume of acetylene measured at standard conditions could be obtained from 10 grams of calcium…

A: The corresponding reaction is, CaC2      +2H2O→     C2H2            +Ca(OH)2 64.1 g/mol…

Q: 5. What is the composition, in atom percent, of an alloy that consists of 30 wt% Zn and 70 wt% Cu?

A:

Q: What is the disadvantage of soda-lime glass?

A: Given: To explain the disadvantage of soda-lime glass

Group 14 Elements

The following elements come under group 14 of the periodic table.