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Chapter 3: Q16DQ (page 83)

Question:In chemistry, what is meant by the term mole? What is the importance of the mole concept?

Short Answer

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Answer

The mole number of a compound, element or molecule which describes atom number of certain presence of molecule called moles number.

Step by step solution

01

AnswerThe mole number of a compound, element or molecule which describes atom number of certain presence of molecule called moles number. 

This is an essential concept due to its important unit in measuring amount. The mole number of a compound, element or molecule which describes atom number of certain presence of molecule called moles number.

02

Concept of the mole

Equal masses with different substance will have different atoms in it because of the molecular weight difference. The atom number present regardless of substance’s molar weight is simply denotes mole. It also will make calculations due to their large atom number by the mole utilization.

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Most popular questions from this chapter

Bornite (Cu3FeS3)is a copper ore used in the production of copper. When heated, the following reaction occurs:

2Cu3FeS3(s)+7O2(g)→6Cu(s)+2FeO(s)+6SO2(g)

.If 2.50 metric tons of bornite is reacted with excess and the process has an 86.3% yield of copper, how much copper is produced?

Many cereals are made with high moisture content so that the cereal can be formed into various shapes before it is dried. A cereal product containing 58% H2Oby mass is produced at the rateof1000kgh. How much water must be evaporated per hour if the final product contains only20% water?

Consider the following reaction:

4NH3g+5O2g→4NOg+6H2Og

If a container were to have 10 molecules of O2and 10 molecules of NH3initially, how many total molecules (reactants plus products) would be present in the container after this reaction goes to completion?

The element europium exists in nature as two isotopes. Eu151has a mass of 150.9196u, and Eu153has a mass of 152.9209u .The average atomic mass of europium is 151.96u. Calculate the relative abundance of the two europium isotopes.

In a mass spectrometer, positive ions are produced when a gaseous mixture is ionized byelectron bombardment produced by an electric discharge. When the electric-discharge voltage is low, singly positive ions are produced and the following peaks are observed in the mass spectrum:

Mass(u)

Relative Intensity

32

0.3743

34

0.0015

40

1.0000


When the electric discharge is increased, still only singly charged ions are produced, but now the peaks observed in the mass spectrum are

Mass(u)

Relative Intensity

16

0.7500

18

0.0015

40

1.0000


What does the gas mixture consist of, and what is the percent composition by isotope of the mixture?
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