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Chapter 3: Q3.5P (page 131)

3.5 What advantage is there to using a counting unit (the mole) inchemistry rather than a mass unit?

Short Answer

Expert verified

The mole is helpful as a counting unit because it facilitates the conversion of other significant quantitiesin a sample, such as mass or the number of entities of a substance (atoms, molecules, ions, and electrons).

Step by step solution

01

Step 1: Introduction to the Concept

In a Species Distribution Unit, the defined unit is used to express a counted or estimated number reflecting the abundance of a species.

02

Step 2: Advantage of using mole as counting unit

Inchemistry, using themole as a counting unitis useful because it aids in theconversion of other significant quantities such as mass or the number of entities of a substance (atoms, molecules, ions, and electrons) in a sample. Between macroscopic samples and individual chemical entities, the mole maintains the same mass connection.

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Most popular questions from this chapter

Find the empirical formula of the following compounds:

(a) 0.063 mol of chlorine atoms combined with 0.22 mol of oxygen atoms

(b) 2.45 g of silicon combined with 12.4 g of chlorine

(c) 27.3 mass % carbon and 72.7 mass % oxygen

Various nitrogen oxides, as well as sulfur oxides, contribute to acidic rainfall through complex reaction sequences. Nitrogen and oxygen combine during high-temperature combustion of fuels in air to form nitrogen monoxide gas, which reacts with more oxygen to form nitrogen dioxide gas. In contact with water vapor, nitrogen dioxide forms aqueous nitric acid and more nitrogen monoxide. (a) Write balanced equations for these reactions. (b) Use the equations to write one overall balanced equation that does not include nitrogen monoxide and nitrogen dioxide. (c) How many metric tons (t) of nitric acid form when 1350 t of atmospheric nitrogen is consumed (1 t = 1000 kg)?

Ferrocene, synthesized in 1951, was the first organic iron compound with bonds. An understanding of the structure of ferrocene gave rise to new ideas about chemical bonding and led to the preparation of many useful compounds. In the combustion analysis of ferrocene, which contains only and a 0.9437-g sample produced 2.233 g of and 0.457 g of What is the empirical formula of ferrocene?

Bismuth oxide reacts with carbon to form bismuth metal: Bi2O3(s)+3C(s)→2Bi(s)+3CO2(g)

When 283 g of Bi2O3reacts with excess carbon,

(a) How many moles of Bi2O3react?

(b) How many moles of Biform?

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(c) A hydrocarbon with 79.9 mass % carbon
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