Molecular formula for

The general molecular formula for alkanes is C H2 +2 What is the general molecular for mula for... 

The general molecular formula for an alkene is Cr,H2n Ethylene is C2H4 propene IS C3H6 Counting the carbons and hydrogens of the compound shown (CsHie) reveals that it too corresponds to CnH2n... 

Molecular Formula. For compounds consisting of discrete molecules, a formula in accordance with the correct molecular weight of the compound should be used. 

Calculation of molecular mass from a molecular formula for several simple substances. Accurate masses are shown in parentheses. 

There is a more important use. Suppose a mass spectrometer has accurately measured the molecular mass of an unknown substance as 58.04189. Reference to tables of molecular mass vs. elemental composition will reveal that the molecular formula is CjH O (see Table 38.2). The molecular formula for an unknown substance can be determined which is enormously helpful in identifying it. 

Accurate mass measurement on a molecular ion of any substance gives directly the molecular formula for fragment ions, similar measurement gives their elemental compositions. 

Write molecular formulas for compounds that show the following molecular ions in their high-resolution mass spectra. Assume that C, H, N, and O might be present, and use the exact atomic masses given in Section 12.2. 

B Nicotine is a diamino compound isolated from dried tobacco leaves. Nicotine has two rings and M + = 162.1157 by high-resolution mass spectrometry. Give a molecular formula for nicotine, and calculate the number of double bonds. 

Given the following condensed formulas, write the molecular formulas for the following molecules. 

Deer ticks are known to cause Lyme disease. The presence of DEET (diethyltoluamide) in insect repellents protects the user from the ticks. The molecular formula for DEET is C12H,7NO. How many grams of carbon can be obtained from 127 g of DEET ... 

Dimefoylhydrazine, foe fuel used in foe Apollo lunar descent module, has a molar mass of 60.10 g/mol. It is made up of carbon, hydrogen, and nitrogen atoms. The combustion of 2.859 g of the fuel in excess oxygen yields 4.190 g of carbon dioxide and 3.428 g of water. What are foe simplest and molecular formulas for dimefoylhydrazine ... 

Write a chemical equation, using molecular formulas, for the reaction of sucrose with water to form glucose and fructose. 

The number and kinds of atoms in a molecule can also be shown in a molecular formula. For example, the water molecule is symbolized H20. In this molecular formula, H means hydrogen atom, O means oxygen atom, and the subscript 2 following H indicates there are two hydrogen atoms bound to the single oxygen atom. The molecular formula of ammonia, NH3, indicates that one molecule of ammonia contains one atom of nitrogen (N) and... 

Carbon dioxide has the formula COj. Remembering that the prefix di means two, and tri means three, write the molecular formula for each of the following substances carbon disulfide, sulfur dioxide, sulfur trioxide. (If you don t know the symbol for an element, use the table inside the back cover of the book.)... 

The molecular formula for the substance formaldehyde is HsCO. Formaldehyde burns to form carbon dioxide and water. What equation represents this reaction ... 

Write the molecular formula for the carbon-hydrogen compound containing two carbon atoms and having empirical formula CH2. What is its molecular weight ... 

Nitrostarch (NS) is a nitrate ester (more properly a mixt of several nitrate esters) of starch, which is a plant-product polysaccharide of the general formula (CgHujOj) The general molecular formula for NS is [C6H7(OH)x-(0NO2)y]n where x + y - 3, The following empirical relation, similar to that used for NC... 

The chemical formula of a compound represents its composition in terms of chemical symbols. Subscripts show the numbers of atoms of each element present in the smallest unit that is representative of the compound. For molecular compounds, it is common to give the molecular formula, a chemical formula that shows how many atoms of each type of element are present in a single molecule of the compound. For instance, the molecular formula for water is H20 each molecule contains one O atom and two H atoms. The molecular formula for estrone, a female sex hormone, is Clgl-I2202, showing that a single molecule of estrone consists of 18 C atoms, 22 FI atoms, and 2 O atoms. A molecule of a male sex hormone, testosterone, differs by only a few atoms its molecular formula is (lyH2802. Think of the consequences of that tiny difference ... 

C03-0017. Write correct molecular formulas for aluminum oxide, potassium dichromate, lead(II) nitrate, nitrogen dioxide, sodium sulfate, iodine pentafluoride, manganese(II) acetate, and sodium hypochlorite.. 

The Lewis dot structure and the molecular formula for the simplest molecule, H2, are... 

Explain why we cannot calculate a molecular formula for a compound of sulfur, sodium, and oxygen ... 

List five possible molecular formulas for a compound with empirical formula CH . 

The true molecular formula for adipic acid is (C3H502)2 = C6Hi0O4. 

A 1.50 2.99 1.00 ratio converts to 3 6 2 by multiplying by 2. Therefore, the simplest formula for this compound is C3H602 (FW = 74.1 g/mol). The true molecular formula for the compound is the same, C3H602, because the true molecular formula is the same as the empirical formula. 

Therefore, the true molecular formula for cyanogen is C2N2. 

The true molecular formula for the organic compound is (CH40)2 = C2H802 with a molecular weight (to 4 significant figures) of 64.08 g/mol. 

Cycloalkanes are cyclic saturated hydrocarbons with the general formula C H2 . Therefore, a substance with the formula C3H8 could not be a cycloalkane, since C3H8 conforms to the general formula, C H2 +2, the molecular formula for an alkane. It is, however, too small to be a branched alkane with a methyl group attached to the longest chain. In fact, C3H8 is propane. 

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