Explanation Mole of any elements is defined as “The amount of the element whose, mass in grams is equal to the atomic mass which is expressed in atomic mass units ( u ). This definition means that mole of any elements will contain the same number of atoms as mole of other element. This constant value is known as Avogadro’s number . Avogadro’s number ( N 0 ) is the number of atoms that is present in per mole of any element or number of formula units present in per mole of any substance. This is equal to 6.02 × 10 23 atoms/mol . The total number of hydrogen molecules and oxygen molecules in one mole will be equal to the Avogadro’s number. The product of total number of moles and the atomic mass of the substance gives the total mass of the substance. Formula mass of Sulfuric acid can be calculated as shown below, Total number of Hydrogen atoms = 2 Mass of one Hydrogen atom = 1 .008 u ∴ Mass of two Hydrogen atoms = 2 × 1 .008 u = 2 .016 u Total number of oxygen atoms = 4 Mass of one Oxygen atom = 16 .00 u ∴ Mass of four Oxygen atoms = 4 × 16 .00 u = 64 .00 u Total number of Sulfur atoms = 1 Mass of one Sulfur atom = 32

Connect with LearnSmart for Krauskopf: The Physical Universe, 16e

16th Edition

ISBN: 9781259663895

Author: KRAUSKOPF, Konrad B.

Publisher: Mcgraw-hill Higher Education (us)

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Chapter 12, Problem 16E

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The mass of 30 mol of Sulfuric acid has to be calculated.

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The mass of 30 mol of Sulfuric acid has to be calculated.

Solution Summary: The author explains how the mass of Sulfuric acid is calculated. The number of hydrogen molecules and oxygen molecules in one mole is equal to Avogadro's number.

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The mass of 30 mol of Sulfuric acid has to be calculated.

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Chapter 12 Solutions