| 单词 | molecular formula |
| 例句 | For those without chemistry degrees, C2H4 is the molecular formula for ethylene, which ripens plants. Your Guide to New York Fashion Week: Men’s 2017-07-07T04:00:00Z The molecular formula is thus derived from the empirical formula by multiplying each of its subscripts by three: Chemistry 2019-02-14T00:00:00Z A drugmaker doesn’t disclose the molecular formula for a new medication in its tax filings. On Corporate Taxes, Put the Public in Publicly Traded: View 2011-10-06T00:22:05Z There is some doubt as to the molecular formula of fulminic acid. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z The probability, however, is that no simple molecular formula adequately represents the constitution of cellulose as it actually exists or indeed reacts. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" This fact, coupled with the determination of the vapour density of the gas, establishes the molecular formula CO. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" Use the molecular formula to find the molar mass; to obtain the number of moles, divide the mass of compound by the molar mass of the compound expressed in grams. Chemistry 2019-02-14T00:00:00Z That the volume relations may be correct a gaseous element must be given its molecular formula. An Elementary Study of Chemistry For example, the molecular formula for acetic acid, the component that gives vinegar its sharp taste, is C2H4O2. Chemistry 2019-02-14T00:00:00Z Note that a molecular formula is always a whole- number multiple of an empirical formula. Chemistry 2019-02-14T00:00:00Z One of these amino acids is glycine, which has the molecular formula C2H5O2N. Chemistry 2019-02-14T00:00:00Z H2 is a molecular formula; it represents a diatomic molecule of hydrogen, consisting of two atoms of the element that are chemically bonded together. Chemistry 2019-02-14T00:00:00Z The molecular formula is then obtained by multiplying each subscript in the empirical formula by n, as shown by the generic empirical formula AxBy: Chemistry 2019-02-14T00:00:00Z Finally, derive the molecular formula for nicotine from the empirical formula by multiplying each subscript by two: Chemistry 2019-02-14T00:00:00Z Assuming ideal solution behavior, what is the molecular formula of the solute? Chemistry 2019-02-14T00:00:00Z What is the molecular formula for the hydride? Chemistry 2019-02-14T00:00:00Z The molecular formula of chloroform indicates that a single molecule contains one carbon atom, one hydrogen atom, and three chlorine atoms. Chemistry 2019-02-14T00:00:00Z Because an ionic compound is not made up of single, discrete molecules, it may not be properly symbolized using a molecular formula. Chemistry 2019-02-14T00:00:00Z Isomers are compounds with the same molecular formula but different arrangements of atoms. Chemistry 2019-02-14T00:00:00Z The empirical formula mass of a covalent compound may be compared to the compound’s molecular or molar mass to derive a molecular formula. Chemistry 2019-02-14T00:00:00Z Determine the empirical and molecular formula for chrysotile asbestos. Chemistry 2019-02-14T00:00:00Z Write a sentence that describes how to determine the number of moles of a compound in a known mass of the compound using its molecular formula. Chemistry 2019-02-14T00:00:00Z Assuming ideal solution behavior, what is the molecular formula of fructose? Chemistry 2019-02-14T00:00:00Z What are the geometry and molecular formula of the blue compound? Chemistry 2019-02-14T00:00:00Z This compound contains 16 hydrogen atoms for a molecular formula of C8H16. Chemistry 2019-02-14T00:00:00Z Constitutional isomers have the same molecular formula but different spatial arrangements of the atoms in their molecules. Chemistry 2019-02-14T00:00:00Z Calculate the molar mass of this fluoride and determine its molecular formula. Chemistry 2019-02-14T00:00:00Z |
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