| 单词 | chemical formula |
| 例句 | Maybe they challenged each other to repeat long chemical formulas? Merci Suárez Changes Gears 2018-09-11T00:00:00Z To see DNA is to forget its name or its chemical formula. The Gene 2016-06-02T00:00:00Z Other environmentally conscious design elements include a drain system that channels rainwater from the roof into the landscaping and artistic fencing embellished with cross-section images of the soil and the chemical formula for petroleum. Mini Mart City Park, a converted gas station in Georgetown, opens as cultural center after 15 years 2022-02-08T05:00:00Z In fact, as Mr. Adams points out, the chemical formula for sodium citrate even spells out “nacho”: Na₃C₆H₅O₇. The Platonic Ideal of Macaroni and Cheese 2021-11-04T04:00:00Z Some of the dissolved CO₂ reacts with the water to form carbonic acid, which has a chemical formula of H₂CO₃. The bubbly chemistry behind carbonated beverages 2023-08-14T04:00:00Z You can email him the chemical formula for a new drug, and his assistants will synthesise it and post it to you. Drugs 2.0: The Web Revolution That's Changing How the World Gets High by Mike Power – review 2013-05-02T07:00:02Z He’s the designer of Flexure, a new building toy that can be used to make all kinds of models, from chemical formulas to funny creatures. Spare Times for Children for Aug. 22-28 2014-08-21T04:00:00Z The precise effects are likely to depend on the chemical formula and, probably more importantly, on the concentration of the substance in the product. 'It's worse than heroin': how spice is ravaging homeless communities 2017-04-15T04:00:00Z One dreamed that their walls and curtains were covered in chemical formulae and another raised their hand for paper and was given sliced bread. Night terrors: what do anxiety dreams mean? 2018-10-03T04:00:00Z The company was named CH4 Power, after the chemical formula for methane. Man Is Sentenced in $9 Million Cow Manure Ponzi Scheme 2023-06-27T04:00:00Z “There are kids ending high school now who don’t know the chemical formula for water,” said Gnap, whose schools have about 1,500 students. War disrupts education of Ukrainian kids, even those who’ve found safety abroad 2023-06-14T04:00:00Z Figure 2.15 Glucose, galactose, and fructose are isomeric monosaccharides, meaning that they have the same chemical formula but slightly different structures. Concepts of Biology 2013-04-25T00:00:00Z THC and CBD have the same chemical formula but different structures, which is why they have different effects on the body. Does weed help you sleep? 2023-04-03T04:00:00Z Whereas shampoo and conditioner involve complicated chemical formulas, many cleaners can be easily concentrated and reconstituted with water. Recyclable? Try refillable. The quest for a greener cleaner 2023-03-19T04:00:00Z However, carbon dioxide, whose chemical formula is CO2, has something in common with methane, whose chemical formula is CH4: They share that C, which is carbon. Opinion | Why we need to strengthen — not weaken — our regulatory system 2022-09-23T04:00:00Z Understanding the relationship between the masses of atoms and the chemical formulas of compounds allows us to quantitatively describe the composition of substances. Chemistry 2019-02-14T00:00:00Z The methane molecule provides an example: it has the chemical formula CH4. Biology for AP Courses 2022-06-09T00:00:00Z The composition of a compound is written in a chemical formula. Miller & Levine Biology 2018-01-01T00:00:00Z “Specific elements” means that most minerals have a specific chemical formula or composition. Physical Geology 2015-01-01T00:00:00Z These light- colored minerals have more silica as a proportion of their overall chemical formula. An Introduction to Geology 2017-01-01T00:00:00Z In this section, these same principles will be applied to derive the chemical formulas of unknown substances from experimental mass measurements. Chemistry 2019-02-14T00:00:00Z Novichok’s distinctive chemical formula differed from that of other known nerve agents, and because of this, Novichok was initially omitted from the Chemical Weapons Convention’s list of banned substances. A legacy of ‘secrecy and deception’: Why Russia clings to an outlawed chemical arsenal 2022-03-19T04:00:00Z A God complex drove humanity to believe we could comprehend and condense the vast complexities of natural ecosystems into a handful of chemical formulas. Designer bacteria could replace oil-intensive chemical fertilizers 2022-03-01T05:00:00Z Its molecules have one carbon and two oxygen atoms, which is why its chemical formula is CO2. Why is there a CO2 shortage and how will it hit food supplies? 2021-09-20T04:00:00Z The common mineral calcite has the chemical formula CaCO indicating the molecule consists of one calcium, one carbon, and three oxygen atoms. An Introduction to Geology 2017-01-01T00:00:00Z Instead of the usual format for chemical formulas in which each element symbol appears just once, a condensed formula is written to suggest the bonding in the molecule. Chemistry 2019-02-14T00:00:00Z Foy typically has students memorize how to read and write names for chemical formulas. As virus cuts class time, teachers have to leave out lessons 2021-02-01T05:00:00Z Even the crystal’s exact structure and chemical formula are not yet understood. First room-temperature superconductor excites — and baffles — scientists 2020-10-13T04:00:00Z One recent online extreme-right post listed chemical formulas for making toxic gases. Far-right and radical Islamist groups are exploiting coronavirus turmoil 2020-04-10T04:00:00Z Polymorphs are crystals with the same chemical formula but different crystal structures. An Introduction to Geology 2017-01-01T00:00:00Z But what if the chemical formula of a substance is unknown? Chemistry 2019-02-14T00:00:00Z The FBI produced a video using Langhorne’s instructions, though it actually featured an inert chemical formula that would not produce an explosion. Man accused of supporting ISIS through bomb-making video 2019-12-05T05:00:00Z Kurt Russell stars as Dexter Riley, a college student who discovers a chemical formula that gives him super strength when he puts it in his cereal. Here are all the classic (and not-so-classic) sports movies you can watch on Disney+ - Golf Digest 2019-11-12T05:00:00Z There was also a Post-it note in one of the pictures, with chemical formulas on it. Russian officials tried to frame Ivan Golunov. Instead they made him a hero | Alexey Kovalev 2019-06-11T04:00:00Z The subscript 2 in the chemical formula indicates the molecule contains two atoms of oxygen. An Introduction to Geology 2017-01-01T00:00:00Z Then try to find a chemical formula that would match the structure you have drawn. Chemistry 2019-02-14T00:00:00Z Moving to Basel in his native Switzerland, he determined its chemical formula using nuclei from salmon sperm. The forgotten scientists who paved the way to the double helix 2019-04-15T04:00:00Z Interestingly, the two simple sugars have the same chemical formula – 6 atoms of carbon, 12 of hydrogen, 6 of oxygen – but different chemical structures. My life without sugar | Olivia Judson 2019-01-26T05:00:00Z That chemical-by-chemical approach, however, permits drug companies to tweak chemical formulas to get around a ban. Fentanyl smuggled from China is killing thousands of Americans - Los Angeles Times 2018-10-19T04:00:00Z “What kind of bottle? What is the chemical formula? Who’s got it?” Putin rejects UK's 'ungrounded accusations' over novichok poisoning 2018-07-16T04:00:00Z When atoms gain or lose electrons to yield ions, or combine with other atoms to form molecules, their symbols are modified or combined to generate chemical formulas that appropriately represent these species. Chemistry 2019-02-14T00:00:00Z Some groups are working on chemical formulas that would reduce the amount of "clinker"—the substance that requires the heating of limestone—that goes into the cement. Cement Producers Are Developing a Plan to Reduce CO2 Emissions 2018-07-09T04:00:00Z He later defected to the US, where he published the chemical formula in his book, State Secrets. What are Novichok nerve agents? 2018-07-05T04:00:00Z I’ll never forget the day he handed me two very similar chemical formulas. Perspective | How to find paint for outdoor furniture that will last in harsh conditions 2017-05-29T04:00:00Z And never mind the chemical formulas that masquerade as food in products that people buy and eat every day. You’d Be Surprised at How Many Foods Contain Added Sugar 2016-05-21T04:00:00Z Fill in the blank with a single chemical formula for a covalent compound that will balance the equation: Chemistry 2019-02-14T00:00:00Z Thanks to Corning's chemical formulas, it's the reason phones are now more scratch- and shock-resistant than earlier models. Bending razor-thin glass to tech's future needs 2015-10-25T04:00:00Z Each one represents a slightly different technique or chemical formula, as the team searches for the right balance of light absorption and durability. Harnessing the sun with the blackest paint in the world - BBC News 2015-06-04T04:00:00Z But after the Legislature banned specific chemicals, drug makers tweaked their chemical formulas slightly to stay just a hair on the right side of legal. K2 continues to vex prosecutors, legal landscape still hazy 2015-05-31T04:00:00Z This is not a true oxide, with a fixed chemical formula. Sheet lightning 2015-05-21T04:00:00Z There are four calcium ions and eight fluoride ions in a unit cell, giving a calcium:fluorine ratio of 1:2, as required by the chemical formula, CaF2. Chemistry 2019-02-14T00:00:00Z For a drug compound, you get the exact chemical formula. J.C. Penney Could See A 50% Increase 2014-09-04T04:00:00Z I try to explain to people that using organic indigo preserves nature and reduces pollution, but the chemical formulas are much less time-consuming. Reviving a Dyeing Technique 2014-08-06T04:00:00Z They steal missile plans, chemical formulas, power-plant pipeline schematics, and economic data. How Russian Hackers Stole the Nasdaq 2014-07-17T04:00:00Z Mr. Churkin did not release the Russian analysis, which he said was 80 pages long and buttressed with chemical formulas and graphs. Russia Says Study Suggests Syria Rebels Used Sarin 2013-07-10T00:21:37Z Write the chemical equations for these combustion reactions using Lewis structures instead of chemical formulas. Chemistry 2019-02-14T00:00:00Z Ramsey was among the first scientists to discover the chemical formula of mephedrone and is as conflicted as any rational observer over drug prohibition. The hidden dangers of legal highs 2013-04-26T21:00:00Z Police also discovered a cache of bomb-making manuals and handwritten notebooks containing chemical formulas, the second source said. New York bomb suspects had "terrorist encyclopedia" 2012-12-31T18:06:56Z The same proteins with the same chemical formula will have different functions depending on their shape. Megadata: The odd couple 2012-11-23T15:20:51.020Z After raising money from backers, they began hiring former Polaroid engineers and buying the company’s equipment, determined to reverse-engineer its chemical formulas and production techniques. Film Photography’s Revival in a Digital World 2012-05-30T23:08:37Z The charges of cations and anions dictate their ratios in ionic compounds, so specifying the names of the ions provides sufficient information to determine chemical formulas. Chemistry 2019-02-14T00:00:00Z Sir Nigel Thompson was working out a chemical formula on the back of an envelope. A Safety Match 2012-03-19T02:00:23.817Z Nature was becoming to them no longer the mother and nurse of man but a collection of chemical formulas for soil, air, sunlight. Paul Gauguin, His Life and Art 2012-02-14T03:00:24.393Z It uses a secret chemical formula to help the resins hold together fiberglass even under challenging combinations of heat and corrosiveness. Rare Earth Metal Refinery Nears Approval in Malaysia 2012-01-31T18:57:17Z It is convenient to treat these glasses as “normal” glasses, but they are in reality mixtures of silicates, and cannot rightly be regarded as definite chemical compounds or represented by definite chemical formulae. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 1 "Gichtel, Johann" to "Glory" 2012-01-11T03:00:20.463Z However, keep in mind that chemical formulas represent the relative numbers, not masses, of atoms in the substance. Chemistry 2019-02-14T00:00:00Z They have stolen blueprints, manufacturing technology and the chemical formulas of market-leading products, according to two intelligence officials, who spoke on the condition their names not be used because of the sensitivity of the subject. SEC Push May Yield New Disclosures of Cyber Attacks on Companies 2012-01-10T11:44:10Z Parkland is the computing center for the Food and Drug Administration, which has access to drug trial information, chemical formulas and other data for almost every important drug sold in the U.S. China-Based Hacking of 760 Companies Reflects Global Cyber War 2011-12-13T17:01:22Z But there is an added bonus to building tangible devices that produce light or electricity, rather than working on chemical formulae or nanotechnology. Electronics: Organic growth 2011-11-23T18:20:49.627Z Illegal drugs are defined in terms of their chemical formulas. What Works: Schools Without Drugs 2011-08-17T02:00:26.487Z The most uncertain factor in the formula is the molecular weight M, since the molecule in solution may be quite different from that denoted by the chemical formula of the solid. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z "The best protection is using a chemical with a physical blocker at once," Downie says, rather than using a purely physical or purely chemical formula. Full Exposure: How Will FDA's Sunscreen Regulations Help Prevent Skin Cancer? 2011-06-27T11:45:02.250Z Isobutanol has the same chemical formula as butanol but a different structure that improves its engine performance and makes it easier to synthesize into other chemicals. Fuel options: The ideal biofuel 2011-06-22T21:50:40.910Z Background Complex chemical formulas aside, rocket fuel is based on a simple idea: create enough power to push an object forward. Under Pressure: Launch a Balloon Rocket 2011-05-05T11:15:02.387Z "Yes," I admitted, "but they won't mean anything to you—they are mainly full of chemical formulae and abbreviated notes." I Walked in Arden 2011-04-10T02:00:06.137Z He could not sit and listen to chemical formulae in a lecture-room; it was not possible. The Promise of Air 2011-02-02T03:00:23.997Z It was a piece of metal which, I soon perceived, was none other than the steel plate on which Noël Dorgeroux had engraved the chemical formula. The Three Eyes 2010-12-20T17:11:46.430Z Iron, nickel, or other metals can substitute in its chemical formula for the more prevalent magnesium and will cause color variations. Area Handbook for Albania Obvious errors in chemical formulas were corrected without comment. Landmarks of Scientific Socialism "Anti-Duehring" All chemical formulas are merely compact forms of expression of what we know about chemical compounds. College Teaching Studies in Methods of Teaching in the College "I only discovered the danger a week ago while working out a chemical formula." The End of Time As an additional precaution, I have not included in it the chemical formula which has resulted from my labours and which is the actual basis of my discovery. The Three Eyes 2010-12-20T17:11:46.430Z We speak of algebraic or chemical formulas, municipal ordinances, military orders, army regulations, ecclesiastical canons, the rules of a business house. English Synonyms and Antonyms With Notes on the Correct Use of Prepositions There are no mathematical, mechanical, or chemical formulas for dealing with the human mind or human energies. Principles of Mining Valuation, Organization and Administration If instead of calling wine wine, we called it by its chemical formula, would this, in any way, change the quality of wine? Manhood of Humanity. A pure limestone is a carbonate, and the chemical formula is CaCO3. Right Use of Lime in Soil Improvement Look for the atom in the body of science, and you will find it in physical laws governing expansion and contraction, and in chemical formulas. The Approach to Philosophy I would recommend to the particular attention of chemists the molecule of water; the deportment of this substance towards radiant heat being perfectly anomalous, if the chemical formula at present ascribed to it be correct. Fragments of science, V. 1-2 Consequently, it is not possible to give the chemical formula, which might, and possibly would, be found but seldom, even in analyses of many specimens. The Chemistry, Properties and Tests of Precious Stones He once read a chemical formula for Edison which nobody but Edison had ever seen. The Last Harvest The chemical formula of this compound, which is CO_2, shows the proportion in which the atoms unite—one atom of carbon uniting with two atoms of oxygen in each of the molecules. Physiology and Hygiene for Secondary Schools Just a mass of chemical formulae, and a concise report on tests. Hunter Patrol Thank Heaven, we have not yet come to think that the highest form of wisdom is enshrined in the sesquipedalia monstra of chemical formulae, still less in the extreme abstractions of mathematics. Nature Mysticism Change the order in which the molecules of the carbon and oxygen are combined in alcohol, and we get ether—the chemical formula remaining the same. The Breath of Life This cellulose is a chemical compound of carbon, hydrogen, and oxygen, and, according to the relative proportions of these constituents, it has had the chemical formula C6H10O5 assigned to it. The Chemistry of Hat Manufacturing Lectures Delivered Before the Hat Manufacturers' Association It was for a long time looked upon by many as a single definite chemical compound, and attempts were made to determine its chemical formula. The Story of the Living Machine A Review of the Conclusions of Modern Biology in Regard to the Mechanism Which Controls the Phenomena of Living Activity There are two forms of tartaric-acid crystals of precisely the same chemical formula, one of which reflects polarized light to the left, and the other to the right. Disease and Its Causes Perhaps you would exchange the caps for blazonry embroidered with chemical formula, your object being the advancement of science! The Feast of St. Friend We know with equal certainty that the difference between certain chemical bodies, like alcohol and ether, is the arrangement of their ultimate particles, since both have the same chemical formula. The Breath of Life It is not isomorphous with the orthorhombic barium and strontium sulphates, as might be expected from the chemical formulae. Encyclopaedia Britannica, 11th Edition, Volume 2, Part 1, Slice 1 Not one of them could read the simplest chemical formula! The Night Horseman Atoms, molecules, chemical formulae, the mathematical propositions in the study of physics—all these have primarily an intellectual value and only indirectly an empirical value. Democracy and Education: an introduction to the philosophy of education Tiny scratches where the light glinted off from the table, little stains upon the leather of the desk, chemical formulae scribbled upon the labels of the phials—nothing was too slight to arrest his attention. Round the Red Lamp For five weeks I crammed, until simultaneous quadratic equations and chemical formulas fairly oozed from my ears. John Barleycorn They are mixtures of different hydrocarbons, the greater part of them having the general chemical formula C_nH_2n+2 where n = 5 or more. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power The scientist offers us little in this field; and his account of inspiration is as cold and comfortless as a chemical formula. The Poet's Poet : essays on the character and mission of the poet as interpreted in English verse of the last one hundred and fifty years "So that was the reason you stopped Mr. Hennessey when he started to tell us the chemical formula?" The Story of Sugar We also find great fertilizer factories turning out, according to proper chemical formula, the needed constituents to furnish impoverished soils with the necessary materials for plant growth. Inca Land Explorations in the Highlands of Peru Only, admittedly, as yet the endocrine label is but roughly qualitative and most crudely quantitative, whereas the chemical formula is the essence of the exact. The Glands Regulating Personality When the chemical formula representing a compound body indicates a substance which is, or can be obtained as, a gas or vapour, it convoys another idea over and above those mentioned on a previous page. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Science also is expression,—an embodiment in words, diagrams, mathematical symbols, chemical formula, or other such media, of thoughts meant to portray the objects of human experience. The Principles of Aesthetics There was no danger of their forgetting Mr. Hennessey and his secret chemical formula. The Story of Sugar As nearly as I could make it out, the paper contained part of a typewritten chemical formula, which read: The Exploits of Elaine What I am getting at now is that some substances with the same chemical formula rotate polarized light to the right, are dextro- rotary, as, for instance, what is known as dextrose. The Treasure-Train Every witty remark, then, lends itself to an analysis, whose chemical formula, so to say, we are now in a position to state. Laughter : an Essay on the Meaning of the Comic Although scientists have been intently studying humus for a century or more, they still do not know its chemical formula. Organic Gardener's Composting There are other reactions for which I have not at present the chemical formulas. Getting Gold: a practical treatise for prospectors, miners and students To-day there are books telling just how many degrees of heat make the water right for scalding hogs, and the metallurgists have written down the chemical formula for puddling iron. The Iron Puddler My life in the rolling mills and what came of it No chemist would undertake to give the chemical formula of the union of sulphuric acid and zinc by a formula which expressed the ultimate nature of atoms or negative electricity. The Journal of Abnormal Psychology, Volume 10 |
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