A Formulas Masses

The empirical formula is C3H2N02, with a formula mass of 84.0 g/mol. This is one-half the experimentally determined molar mass. Thus, the molecular formula is C6H4N204. [Pg.306]

Appendix A Formula Masses (FM) for Various Combinations of Carbon, Hydrogen, Nitrogen, and Oxygen3... [Pg.45]

A. An organic compound with a formula mass of 417 was analyzed for ethoxyl (CH3CH20—) groups by the reactions... [Pg.640]

Calculate a formula mass corresponding to the empirical formula, and compare it with the molecular mass of ascorbic acid. [Pg.101]

Using the steps outlined in Figure 3.9, find the empirical formula of caproic acid, calculate a formula mass, and compare with the known molecular mass. [Pg.101]

To calculate a formula mass To calculate the percent composition by mass from the formula of a compound... [Pg.196]

Determine the molecular formula of the compound with an empirical formula of CH and a formula mass of 78.110 amu. [Pg.880]

A compound with a formula mass of 42.08 amu is found to be 85.64% carbon and 14.36% hydrogen by mass. Find its molecular formula. [Pg.880]

Determine the formula mass corresponding to one empirical formula unit. CH has a formula mass of 12-1-1 = 13 amu. [Pg.51]

Nabam is a fungicide used on potato plants. It is 17.94% sodium, 18.74% carbon, 2.36% hydrogen, 10.93% nitrogen, and 50.03% sulfur and has a formula mass of 256.35. Nabam is an ionic compound with a formula that is not an empirical formula. What is the formula for nabam ... [Pg.364]

From this we deduce the empirical formula, NOj, and a formula mass of 46. The molecular mass of the oxide was found to be 92. We construct a table of multiples of the empirical formula and corresponding molecular masses ... [Pg.91]

A 15.0-mg sample of a compound with a formula mass of 384.63 was dissolved in a 5-mL volumetric flask. A 1.00-mL aliquot was withdrawn, placed in a 10-mL volumetric flask, and diluted to the mark. [Pg.405]

A 0.267-g quantity of a compound with a formula mass of 337.69 was dissolved in 100.0 mL of ethanol. Then 2.000 mL were withdrawn and diluted to 100.0 mL. The spectrum of this solution exhibited a maximum absorbance of 0.728 at 438 nm in a 2.000-cm cell. Find the molar absorptivity of the compound. [Pg.405]

Iron for biosynthesis is transported through the bloodstream by the protein transferrin (Figure 19-15). A solution of transferrin can be titrated with iron to measure its iron-binding capacity. Transferrin without iron, called apotransferrin, is colorless. Each protein molecule with a formula mass of 81 000 has two Fe -binding sites. When Fe binds to the protein, a red color with an absorbance maximum at 465 nm develops. The color intensity allows us to follow the course of the titration of an unknown amount of apotransferrin with standard Fe. ... [Pg.418]

A compoxmd contains only carbon and hydrogen and has a formula mass of 28.06 amu. What is its molecular formula ... [Pg.159]

For example, H2O has a formula mass of 18.02 amu therefore, HjO has a molar mass of 18.02 g/mol-one mole of water molecules has a mass of 18.02 grams. Just as the molar mass of an element is a conversion factor between grams of the element and moles of the element, so the molar mass of a compound is a conversion factor between grams of the compound and moles of the molecule. [Pg.114]

For polymers, the repeat unit in the polymer chain is used for Pyro Valence calculations, using the formula weight of the repeat unit for mass calculations. For example, starch can be represented by (C6H,o05)n, with a formula mass per repeat unit of 162 and a Pyro Valence of -i-24 (+24 + 10 - 10 = +24). The Pyro Valence procedure discussed in Chapter 2 provides the easiest way to balance oxidizer-organic fuel systems, including those that contain polymers. [Pg.85]

If 4.04 g of N combine with 11.46 g O to produce a compound with a formula mass of 108.0 u, what is the molecular formula of this compound ... [Pg.237]

An oxide of chromium used in chrome plating has a formula mass of 100.0 u and contains/owr atoms per formula unit. Establish the formula of this compound, with a minimum of calculation. [Pg.105]

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