(a)
Interpretation:
The chemical formula for the given mineral cinnabar has to be written.
Concept introduction:
Chemical formula indicates the elements present in a compound and the relative number of atoms of each.
Example:
Minerals are the element or compound found in the earth that is solid, formed naturally in the earth. It has a definite atomic pattern.
(b)
Interpretation:
The chemical formula for the given mineral bauxite has to be written
Concept introduction:
Chemical formula indicates the elements present in a compound and the relative number of atoms of each.
Example:
Minerals are the element or compound found in the earth that is solid, formed naturally in the earth. It has a definite atomic pattern.
(c)
Interpretation:
The chemical formula for the given mineral sphalerite has to be written
Concept introduction:
Chemical formula indicates the elements present in a compound and the relative number of atoms of each.
Example:
Minerals are the element or compound found in the earth that is solid, formed naturally in the earth. It has a definite atomic pattern.
(d)
Interpretation:
The chemical formula for the given mineral chromite has to be written
Concept introduction:
Chemical formula indicates the elements present in a compound and the relative number of atoms of each.
Example:
Minerals are the element or compound found in the earth that is solid, formed naturally in the earth. It has a definite atomic pattern.
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General Chemistry: Atoms First
- Explain the terms : (a) Intrinsic semiconductor (b) Extrinsic semiconductor.arrow_forwardWrite balanced chemical equations for the following reactions:(a) metallic aluminum burned in air(b) elemental aluminum heated in an atmosphere of chlorine(c) aluminum heated in hydrogen bromide gas(d) aluminum hydroxide added to a solution of nitric acidarrow_forward(a) Give an example of zone refining of metals. (b) What is the role of cryolite in the metallurgy of aluminium?arrow_forward
- (i) Indicate the principle behind the method used for the refining of zinc.(ii) What is the role of silica in the extraction of copper?(iii) Which form of the iron is the purest form of commercial iron?arrow_forwardWrite the equation for the reaction of:(a) Iron with steam(b) Calcium with water(c) Potassium with waterarrow_forwardAccount for the following:(i) Schottky defects lower the density of related solids.(ii) Conductivity of silicon increases on doping it with phosphorus.arrow_forward
- Silicon carbide (SiC) is made by the high-temperature reaction of silica sand (quartz) with coke; the byproduct is carbon monoxide.(a) Write a balanced chemical equation for this reaction.(b) Calculate the standard enthalpy change per mole of SiC produced.(c) Predict (qualitatively) the following physical properties of silicon carbide: conductivity, melting point, and hardness.arrow_forwardWrite balanced chemical equations for the following reactions:(a) sodium oxide added to water(b) cesium carbonate added to an excess of an aqueous solution of HF(c) aluminum oxide added to an aqueous solution of HClO4(d) a solution of sodium carbonate added to solution of barium nitrate(e) titanium metal produced from the reaction of titanium tetrachloride with elemental sodiumarrow_forwardUsing Table 22.1, predict the structure of each of the fol- lowing silicate minerals (network, sheets, double chains, and so forth). Give the oxidation state of each atom. (a) Andradite, Ca3Fe2(SiO4)3 (b) Vlasovite, Na,ZrSi,O10 (c) Hardystonite, Ca,ZnSi¿O7 (d) Chrysotile, Mg;Si,O5(OH)4arrow_forward
- (a) Giving examples differentiate between calcination and roasting.(b) What is the role of cryolite in the extraction of aluminium?arrow_forward(а) Give an example of zone refining of metals. (b) What is the role of cryolite in the metallurgy of aluminium?arrow_forwardWrite a balanced equation for each reaction:(a) Thermal decomposition of witherite (barium carbonate)(b) Neutralization of stomach acid (HCl) by milk of magnesia(magnesium hydroxide)arrow_forward
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