Geology 05: Chemical Formula Of Ore Minerals

Galena is the correct answer because it is a mineral that is composed of lead sulfide (PbS). It is the most important ore of lead and is commonly found in association with other sulfide minerals. Galena has a metallic luster and is often gray in color. It is used in various industries, including the production of lead-acid batteries and as a source of lead in the manufacturing of ammunition.

Molybdenite is the correct answer because it is the only option that matches the given chemical formula "MoS2". Magnetite and magnesite do not have the same chemical formula, so they cannot be the correct answer. Therefore, Molybdenite is the only option that fits the given information.

Hematite is the correct answer because Fe2O3 is the chemical formula for hematite. Hematite is an iron oxide mineral that is commonly found in rocks and soils. It is known for its reddish-brown color and metallic luster. Hematite is an important ore of iron and is used in the production of iron and steel. It is also used as a gemstone and in various industrial applications. Chalcopyrite and magnetite are different minerals and do not have the same chemical formula as Fe2O3.

Cassiterite is the correct answer because it is the only mineral listed that has the chemical formula SnO2. Hematite is an iron oxide with the formula Fe2O3, while Ilmenite is a titanium-iron oxide with the formula FeTiO3. Therefore, neither of these minerals match the given chemical formula.

Magnetite is the correct answer because Fe3O4 is the chemical formula for magnetite. Magnetite is a black mineral that is magnetic, hence the name. It is an important iron ore and is commonly found in igneous and metamorphic rocks. Cinnabar is a red mineral composed of mercury sulfide, while Hematite is an iron oxide mineral that is typically red or brown in color.

Cinnabar is the correct answer because it is the chemical formula for mercury sulfide (HgS). Cassiterite is the mineral form of tin dioxide (SnO2), Ilmenite is the mineral form of iron titanium oxide (FeTiO3), and Cinnabar is the mineral form of mercury sulfide (HgS). Therefore, Cinnabar matches the given chemical formula.

Rutile is the correct answer because TiO2 is the chemical formula for rutile. Rutile is a mineral composed primarily of titanium dioxide and is one of the three main forms of titanium dioxide found in nature. Pyrolusite and sheelite are not correct answers because they are different minerals with different chemical compositions.

Sphalerite is the correct answer because it is the only mineral listed that has the chemical formula ZnS. Rutile and kaolinite are different minerals with different chemical formulas, so they cannot be the correct answer. Since the question does not provide any additional information, it is safe to assume that the correct answer is Sphalerite based on its chemical formula matching the given information.

Dolomite is the correct answer because CaMg(CO3)2 refers to the chemical formula of dolomite. Dolomite is a mineral that consists of calcium magnesium carbonate. It is commonly found in sedimentary rocks and is often used as a source of magnesium and calcium in various industries. Magnesite is a different mineral composed of magnesium carbonate, while magnetite is an iron oxide mineral.

Kaolinite is the correct answer because the chemical formula Al2Si2O5(OH)4 matches the composition of kaolinite. Kaolinite is a clay mineral that is formed from the weathering of aluminum silicate minerals. It is commonly found in soils and sedimentary rocks and is known for its white color and fine particle size. Kaolinite is used in a variety of industries, including ceramics, paper, and cosmetics.

Chalcopyrite is the correct answer because CuFeS2 is the chemical formula for chalcopyrite. Chalcopyrite is a copper iron sulfide mineral that is commonly found in copper deposits. It has a brassy yellow color and a metallic luster. Chalcopyrite is an important source of copper and is often used in the production of copper metal and other copper-containing products.

Corundum is the correct answer because it is the chemical formula for aluminum oxide (Al2O3). Corundum is a naturally occurring mineral that is commonly used as an abrasive due to its hardness. It is also used in the production of refractory materials and as a gemstone, with the red variety known as ruby and the blue variety known as sapphire. Dolomite and kaolinite are different minerals and not represented by the chemical formula Al2O3.

Magnesite is the correct answer because MgCO3 is the chemical formula for magnesite. Magnesite is a mineral composed of magnesium carbonate and is commonly found in metamorphic rocks. It is often used as a source of magnesium and as a refractory material in the production of ceramics.

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Ilmenite is the correct answer because FeTiO3 is the chemical formula for ilmenite. Ilmenite is a mineral composed mainly of iron, titanium, and oxygen. It is commonly found in igneous rocks and is an important source of titanium. Rutile and dolomite are different minerals and do not have the same chemical formula as FeTiO3.

Azurite is the correct answer because Cu3(CO3)2(OH)2 is the chemical formula for azurite. Azurite is a copper carbonate mineral that is commonly found in oxidized copper ore deposits. Its blue color and distinctive crystal structure make it easily recognizable. Chalcopyrite and bornite are different minerals that contain copper, but their chemical formulas are not the same as Cu3(CO3)2(OH)2.

Malachite is the correct answer because Cu2(CO3)(OH)2 is the chemical formula for malachite. Malachite is a green mineral that is commonly found in copper deposits. It is formed through the weathering of copper ore minerals and is often used as an ornamental stone. Chalcosite and chalcopyrite are also copper minerals, but their chemical formulas do not match Cu2(CO3)(OH)2.

Chalcocite is the correct answer because Cu2S is the chemical formula for chalcocite. Chalcocite is a copper sulfide mineral that is commonly found in hydrothermal veins and is an important source of copper. It has a black color and a metallic luster. Chalcopyrite, on the other hand, has the chemical formula CuFeS2 and is a different copper sulfide mineral. Malachite is a copper carbonate mineral and has the chemical formula Cu2CO3(OH)2, which is not the same as Cu2S.

Bornite is the correct answer because Cu5FeS4 is the chemical formula for bornite, which is a copper iron sulfide mineral. Bornite is known for its iridescent colors and is often referred to as "peacock ore" due to its vibrant hues. It is commonly found in hydrothermal veins and is an important copper ore.

Pentlandite is the correct answer because the chemical formula (Ni,Fe)9S8 matches the composition of pentlandite. Pentlandite is a sulfide mineral that contains a combination of nickel (Ni) and iron (Fe). The formula indicates that there are nine atoms of (Ni,Fe) for every eight atoms of sulfur (S), which corresponds to the composition of pentlandite. Therefore, pentlandite is the mineral that is represented by the given chemical formula.

Pyrolusite is the correct answer because it is a mineral that consists of manganese dioxide (MnO2). Rhodochrosite and dolomite are minerals that contain manganese but not in the form of MnO2. Rhodochrosite is a manganese carbonate (MnCO3) and dolomite is a calcium magnesium carbonate with some manganese substitution. Therefore, only pyrolusite matches the chemical formula MnO2.

Chromite is the correct answer because the chemical formula (Fe,Mg)(Cr,Al,Fe)2O4 matches the composition of chromite. Chromite is a mineral that contains iron, magnesium, chromium, and aluminum, which are all elements present in the chemical formula. Corundum and Chalcosite do not match the chemical formula and are therefore not the correct answer.

Rhodochrosite is the correct answer because it is the mineral that corresponds to the chemical formula MnCO3. Rhodochrosite is a manganese carbonate mineral that typically occurs in shades of pink or red. It is a popular gemstone and is known for its beautiful color and unique banding patterns. Magnesite, on the other hand, is a magnesium carbonate mineral, while pyrolusite is a manganese dioxide mineral.