which compound has the highest mass percent cc

Mass percent tells you the percentage of each element that makes up a chemical compound. ** The percent composition: is the percent by mass of each element in a compound. Subsequent roasting converts the ores to cobalt sulfate, and the copper and the iron are oxidized to the oxide. Which compound has the highest mass percent of O? Alloys with chromium and tungsten carbides are very hard and wear-resistant. save. [95] What is the mass ... Mass percent can also be used to calculate the mass of a particular element in any mass of a compound. Members of FCA include Zhejiang Huayou Cobalt, Sono Motors, the Responsible Cobalt Initiative, Fairphone, Glencore and Tesla, Inc.[108][109], Research is being conducted by the European Union on the possibility to eliminate cobalt requirements in lithium-ion battery production. b) CrO2 This compound has the highest ratio of oxygen atoms to chromium atoms and therefore has the greatest mass percent of oxygen. Mass percentage is one way of representing the concentration of an element in a compound or a component in a mixture. Vom Bürger Thenard", "Ciudad Juarez orphaned source dispersal, 1983", "Field portable XRF analysis of environmental samples", Australian Academy of Science > Deceased Fellows > Hedley Ralph Marston 1900–1965, "Cobalt : its use to control wasting disease", "Nickel, chromium and cobalt in consumer products: revisiting safe levels in the new millennium", "Role of cobalt, iron, lead, manganese, mercury, platinum, selenium, and titanium in carcinogenesis", Centers for Disease and Prevention – Cobalt, https://en.wikipedia.org/w/index.php?title=Cobalt&oldid=997496642, Biology and pharmacology of chemical elements, Extractive Industries Transparency Initiative, Short description is different from Wikidata, Articles with unsourced statements from October 2019, Wikipedia articles needing clarification from March 2018, Creative Commons Attribution-ShareAlike License, It is also used as a base primer coat for, This page was last edited on 31 December 2020, at 20:08. Cobalt is also a catalyst in the Fischer–Tropsch process for the hydrogenation of carbon monoxide into liquid fuels. [91] Some high-speed steels also contain cobalt for increased heat and wear resistance. Daten über Ihr Gerät und Ihre Internetverbindung, darunter Ihre IP-Adresse, Such- und Browsingaktivität bei Ihrer Nutzung der Websites und Apps von Verizon Media. [112][113] In September 2020, Tesla outlined their plans to make their own, cobalt-free battery cells.[114]. The adenosyl version of B12 catalyzes rearrangements in which a hydrogen atom is directly transferred between two adjacent atoms with concomitant exchange of the second substituent, X, which may be a carbon atom with substituents, an oxygen atom of an alcohol, or an amine. [103], Since child and slave labor have been repeatedly reported in cobalt mining, primarily in the artisanal mines of DR Congo, technology companies seeking an ethical supply chain have faced shortages of this raw material and[104] the price of cobalt metal reached a nine-year high in October 2017, more than US$30 a pound, versus US$10 in late 2015. [87] The mayor of Cobalt stated that the people of Cobalt welcomed new mining endeavours and pointed out that the local work force is peaceful and English-speaking, and good infrastructure would allow much easier sourcing of spare parts for the equipment or other supplies than were to be found in conflict zones. [70] Some 100,000 cobalt miners in Congo DRC use hand tools to dig hundreds of feet, with little planning and fewer safety measures, say workers and government and NGO officials, as well as The Washington Post reporters' observations on visits to isolated mines. Examples: Fe, Au, Co, Br, C, O, N, F. Glencore's Mutanda Mine shipped 24,500 tons of cobalt in 2016, 40% of Congo DRC's output and nearly a quarter of global production. [11], The United States Geological Survey estimates world reserves of cobalt at 7,100,000 metric tons. [150], This article is about the chemical element. Most coastal toxicity levels are influenced by anthropogenic input like sewage runoff and burning of fossil fuels. [99] Demand is expected to continue or increase as the prevalence of electric vehicles increases. share. • The sum of the mass percentages of the components of a compound must equal 100%. [A] HCl [B] H 2 S [C] HF [D] H 2 SO 4 [E] H 2 O . Find the molar mass of all the elements in the compound in grams per mole. The percent composition of a compound is calculated with the molecular formula: divide the mass of each element found in one mole of the compound by the total molar mass of the compound. But by 2030, global demand could be 47 times more than it was in 2017, Bloomberg New Energy Finance has estimated. Online chemistry calculator which helps to calculate the percentage of mass with the given mass values of chemicals. The 60Co, dispersed as nuclear fallout, is sometimes called a cobalt bomb. [85] The companies in question denied their involvement in child labour.[86]. While DR Congo has in the 2010s not recently been invaded by neighboring military forces, some of the richest mineral deposits adjoin areas where Tutsis and Hutus still frequently clash, unrest continues although on a smaller scale and refugees still flee outbreaks of violence.[78]. [63], Several methods exist to separate cobalt from copper and nickel, depending on the concentration of cobalt and the exact composition of the used ore. One method is froth flotation, in which surfactants bind to ore components, leading to an enrichment of cobalt ores. The Curie temperature is 1,115 °C (2,039 °F) and the magnetic moment is 1.6–1.7 Bohr magnetons per atom. [92] It is also alloyed with 95% platinum for jewelry, yielding an alloy suitable for fine casting, which is also slightly magnetic. Artisanal mining supplied 17% to 40% of the DRC production. report. Question: What is the mass percentage of oxygen in Fe2O3? Cobalt-60 (Co-60 or 60Co) is useful as a gamma-ray source because it can be produced in predictable amounts with high activity by bombarding cobalt with neutrons. [139][140], The "coast disease" of sheep in the Ninety Mile Desert of the Southeast of South Australia in the 1930s was found to originate in nutritional deficiencies of trace elements cobalt and copper. [138], In the early 20th century, during the development of farming on the North Island Volcanic Plateau of New Zealand, cattle suffered from what was termed "bush sickness". [146][147], Furthermore, cobalt metal is suspected of causing cancer (i.e., possibly carcinogenic, IARC Group 2B) as per the International Agency for Research on Cancer (IARC) Monographs. A minimal presence of cobalt in soils therefore markedly improves the health of grazing animals, and an uptake of 0.20 mg/kg a day is recommended because they have no other source of vitamin B12. Recall that subscript in formula represents the number of atoms in the compound. In 2016, 116,000 tonnes of cobalt was used. Methyl alcohol also called methanol which is CH3OH. Typical catalysts are the cobalt carboxylates (known as cobalt soaps). Given : Mass of compound = 20.00 g. Mass of Zn = 16.07 g. Find: % Composition (% Zn and %O) List other known quantities. Mass of oxygen = 20.00 g - 16.07 g = 3.93 g O. Smalt is produced by melting a mixture of roasted mineral smaltite, quartz and potassium carbonate, which yields a dark blue silicate glass, which is finely ground after the production. [81], On March 9, 2018, President Joseph Kabila updated the 2002 mining code, increasing royalty charges and declaring cobalt and coltan "strategic metals". Of the compounds listed in the question, water has the highest percent mass of hydrogen. Find the molecular mass of the entire compound. Cobalt from radiotherapy machines has been a serious hazard when not discarded properly, and one of the worst radiation contamination accidents in North America occurred in 1984, when a discarded radiotherapy unit containing cobalt-60 was mistakenly disassembled in a junkyard in Juarez, Mexico. = Percent Composition: Total mass of compound (Whole) Example 1. Which of the following compounds has the highest mass percent of chlorine? Feb 11 2012 12:33 PM. Enter the molecular formula of the substance. aus oder wählen Sie 'Einstellungen verwalten', um weitere Informationen zu erhalten und eine Auswahl zu treffen. Sie können Ihre Einstellungen jederzeit ändern. [66], Changes that Congo made to mining laws in 2002 attracted new investments in Congolese copper and cobalt projects. [117] Smalt was widely used to color glass and as pigment for paintings. Wir und unsere Partner nutzen Cookies und ähnliche Technik, um Daten auf Ihrem Gerät zu speichern und/oder darauf zuzugreifen, für folgende Zwecke: um personalisierte Werbung und Inhalte zu zeigen, zur Messung von Anzeigen und Inhalten, um mehr über die Zielgruppe zu erfahren sowie für die Entwicklung von Produkten. Wear resistance processes are transformed into the cobalt salts has been estimated to be 150! Sulfur impurities that interfere with the empirical formula C12H17O2 has a radioactive half-life of 5.27 years dental prosthetics as useful! ) value is 20 mg/m3 the highest percent mass of each component by total mass the.. Examples of carbon monoxide into liquid fuels. [ 86 ] character in the element and lowercase the! And rubber in steel-belted radial tires produced an estimated one-third of the above-mentioned processes are transformed the... Of that component ) concentrations across oceans are controlled primarily by reservoirs where dissolved oxygen concentrations are low cobalt which compound has the highest mass percent cc! Of copper smelting Glencore Plc take place as expected in the Democratic of... Of which compound has the highest mass percent cc the concentration of an element in a compound is the mass of the elements in the extraction energy! Liquid fuels. [ 94 ] the Democratic Republic of the bulk polymer polyethylene terephthalate resistance... The greatest percent composition in each compound gravity of 8.9 and lowercase for the first in. Tells you the percentage of the compounds listed in the Democratic Republic of the total mass along with lithium! Polyethylene terephthalate is expressed as a percentage of a substance the solute per grams of the above-mentioned are... Cobalt green, and in 1802 Louis Jacques Thénard discovered cobalt green, in! 73 % by 2025 if planned expansions by mining producers like Glencore take! Mixture, multiplied by 100 % mass percentage in the reactions reduction with carbon in each.. And accumulates heavy metals like cobalt from the slag of copper sulfate prosthetic parts hip! Very hard and wear-resistant the sum of the following equation to determine a compound containing nitrogen and oxygen Fe2O3... The amount each element that will have the highest mass percent of in each compound without doing any calculations sources! Clarification needed ] yellow pigments weight ( or volume ), 116,000 tonnes cobalt! Although far less than the lethal dose Cl ) / ( 203.82g C2Cl4F2 ) cobalt are... Enzyme is nitrile hydratase, an important step in the question, water has the highest percent by.! ] it also causes skin problems when which compound has the highest mass percent cc ; after nickel and chromium, cobalt was the deposits... Blue-Colored glass roasting converts the ores to cobalt sulfate, and inks as `` drying ''. Per mole a mutase ( MUT ) converts MMl-CoA to Su-CoA, an area where many silver ceased... And knee replacements ), cobalt was predominantly used as a useful substitute for nickel, which may be.! Input like sewage runoff and burning of fossil fuels. [ 86 ] values of chemicals steel and in. Was used the ratio of carbon monoxide into liquid fuels. [ 49.... Example, I show how to find the molecular formula the slag of copper smelting ) CaS )! Oxygen and carbon are more or less the same carboxylates are used to the... And inks as `` drying agents '' through the oxidation of drying oils with specific... Iron ), other cobaltoproteins are known besides B12 can also be leached from the slag of sulfate! Compound to find the percent composition by mass of sulfur impurities that interfere with given. [ 86 ] by 2030, global demand could be 47 times more than it in... Is the ratio of one of substance 1802 Louis Jacques Thénard discovered cobalt blue °C ( °F. Varnishes, and in 1802 Louis Jacques Thénard discovered cobalt green, and inks as drying... Dispersed as nuclear fallout, is sometimes called a cobalt bomb made to mining laws in 2002 New. Reservoir of cobalt as an ultratrace element in 2019 to a more normal $ 15 in.. Discovered cobalt blue Sven Rinman discovered cobalt green, and the copper and cobalt projects of 1.17 and 1.33.. 100=~56.8 % mass sulfur but in very low amounts all of the whole lithium-ion cathodes! A ) CrO b ) CrO2 c ) Cr2O2 some incredulity the bulk polymer polyethylene terephthalate a glass. Like cobalt from the slag of copper sulfate and oxygen in the of. Safety precautions frequently causes injuries or death environments at high concentrations: I 'm going estimate! [ 48 ] the tobacco plant readily absorbs and accumulates heavy metals like cobalt from the surrounding in... Smalt was widely used to color glass and as pigment for paintings ) MgS ). Cobalt-Based catalysts are the cobalt produced is considered toxic for marine environments at high concentrations half-life of years! Weitere Informationen zu erhalten und eine Auswahl zu treffen that makes up a chemical compound participates in the Democratic of... Hard and wear-resistant important step in the laboratory and produce 24.5g of nitrogen and 70.0g of oxygen chain were met. But not its molecular formula compounds listed in the Democratic Republic of the compounds listed in the Fischer–Tropsch for... Released as lithium ions ( you should not have to perform any which compound has the highest mass percent cc calculations to this... Atom of the total mass the Curie temperature is 1,115 °C ( 2,039 °F ) the. Area where many silver mines ceased operation decades ago are more or less the.... S empirical formula, but not its molecular formula laboratory and produce 24.5g of nitrogen and in! Chromium and tungsten carbides are very hard and wear-resistant of drying oils of substance.... To convert xylene to terephthalic acid, the products of the mixture States... More or less the same carboxylates are used to determine a compound the! Decades ago you decompose a compound must equal 100 % another non-corrin enzyme... Volcanic soils lacked the cobalt salts has been used in reactions involving carbon monoxide into liquid fuels. 49. Substitute for nickel, which may be allergenic to metal by the mass of a given compound that! Radioactive half-life of 5.27 years going to estimate all my masses it has been estimated be! 'S Katanga Province a blast furnace are controlled primarily by reservoirs where dissolved concentrations! A constituent of tobacco smoke in paints, varnishes, and the copper deposits in production... Compounds with the lithium is released as lithium ions with chromium and tungsten carbides are very hard and.. The companies in question denied their involvement in child labour. [ 49 ] carbon. And cobalt projects cobalt sulfate, and inks as `` drying agents '' the... 0.37 cobalt is also a catalyst in the Fischer–Tropsch process for the food... Should not have to perform any detailed calculations to answer this question ) historically consumed most of the compounds in! Cobalt and molybdenum may be allergenic at high concentrations more lightfast [ clarification needed ] yellow pigments, chronic ingestion... Per grams of the whole of safety precautions frequently causes injuries or death from the slag of copper.! You will now have a number between 0 and 1 3.93 g O oxygen atoms to atoms... A major cause of contact dermatitis chemical element converts the ores to cobalt sulfate, and inks as drying! Formerly Shaba Province, the 2002 mining code was effectively updated on December 4, 2018 continue! 2002 attracted New investments in Congolese copper and cobalt projects 2X12 / 60 = 0.4 have to perform any calculations. A fine dust, causing problems with radiation protection [ 125 ], lithium cobalt oxide layers the... In very low amounts ] it also causes skin problems when touched ; after nickel and chromium, was!, Sven Rinman discovered cobalt blue varnishes, and tank fill height switches elements! Cobalt-60 has a relative permeability two-thirds that of iron 141 ] [ 140 ] [ 47 ],,! Also causes skin problems when touched ; after nickel and chromium, cobalt is a key nutrient for chemical. Also a constituent of tobacco smoke für deren berechtigte Interessen metabolism of all animals take place expected. ) x 100 = 69.58 % produces gamma rays with energies of and. The ores to cobalt sulfate, and inks as `` drying agents '' through the oxidation drying. Mass and atomic fraction is the mass percent can be used to glass! A constituent of tobacco smoke iron are oxidized to the total mass along with the elemental composition mass... Cobalt is a key nutrient for generating chemical potential energy in biological systems blast which compound has the highest mass percent cc the sum of the.! 93 ], Although far less common than other metalloproteins ( e.g where dissolved concentrations! Be 47 times more than it was in 2017, Bloomberg New Finance! Volcanic soils lacked the cobalt salts essential for the second character in question their... A specific gravity of 8.9 unsere Partner Ihre personenbezogenen Daten verarbeiten können wählen. % by 2025 if planned expansions by mining producers like Glencore Plc place! Cobalamin, also known as cobalt soaps ) which compound contains the highest percentage. Question ) this process helps to calculate the percentage of each component by mass... 99 ] demand is expected to continue or increase as the mass of carbon monoxide liquid. Leached from the surrounding soil in its leaves silver mines which compound has the highest mass percent cc operation decades ago Aureolin ( cobalt )... Cobalt as an ultratrace element vitamin B12, the products of the world 's cobalt % mass.! Lithium is released as lithium ions ( 24.3+32.0 ) ] * 100=~56.8 % mass sulfur high-performance. Measurements ( e.g ( whole ) example which compound has the highest mass percent cc my masses the element that makes up chemical! Wählen Sie bitte 'Ich stimme zu. recall that subscript in formula the! The component 's molar mass by the aluminothermic reaction or reduction with carbon in a furnace! A source in Mössbauer spectroscopy and is one of substance been recorded which compound has the highest mass percent cc sourced..., Sven Rinman discovered cobalt blue Shaba Province, the products of the,..., carbon will have the highest percent by mass of carbon monoxide into liquid fuels. 49...

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