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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Identify the factor labeled 4 in the strategy map

  1. (a) Density H2O(), 1.00 g/mL
  2. (b) Density of O2(), 1.14 g/mL
  3. (c) molar mass of O2, 32.0 g/mol
  4. (d) molar mass of H2O, 18.0 g/mol

below. Labels 1 through 5 are the factors used in each step of the calculation, and A is the mass of O2 and B is the amount of H2O.

images

Interpretation Introduction

Interpretation:

The factor labeled 4 in the given strategy map has to be identified.

Concept introduction:

  • The relation between the number of moles and mass of the substance is ,

     Numberofmole=MassingramMolarmass

     Massingramofthesubstance=Numberofmole×Molarmass

  • The molar mass of an element or compound is the mass in grams of 1 mole of that substance, and it is expressed in the unit of grams per mole (g/mol).
  • Concentrationofsubstance=Amountof substancevolumeofthesubstance
  • Amountof substance=Concentrationofsubstance×volumeofthesubstance
Explanation

Reason for the correct option:

The given strategy map is,

  VolO21A2molO23B4MassofH2O5VolH2O

Here A is the mass of O2 and B is the amount of H2O.

The relation between the number of moles and mass of the substance is ,

     Numberofmole=MassingramMolarmass

     Massingramofthesu

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