(a) Interpretation: The number of molecules present in 3.45 g of C 6 H 12 O 6 should be calculated. Concept Introduction: According to Avogadro’s number , one mole of a compound contains 6.023 × 10 23 molecules. Number of moles of a compound is calculated by dividing the given mass of the compound by its molar mass. Moles = M a s s M o l a r M a s s .
(a) Interpretation: The number of molecules present in 3.45 g of C 6 H 12 O 6 should be calculated. Concept Introduction: According to Avogadro’s number , one mole of a compound contains 6.023 × 10 23 molecules. Number of moles of a compound is calculated by dividing the given mass of the compound by its molar mass. Moles = M a s s M o l a r M a s s .
Solution Summary: The author explains how the number of molecules in a compound is calculated by dividing the given mass of the compound by its molar mass.
Definition Definition Number of atoms/molecules present in one mole of any substance. Avogadro's number is a constant. Its value is 6.02214076 × 10 23 per mole.
Chapter 8, Problem 116AP
Interpretation Introduction
(a)
Interpretation:
The number of molecules present in 3.45 g of C6H12O6 should be calculated.
Concept Introduction:
According to Avogadro’s number, one mole of a compound contains 6.023×1023 molecules.
Number of moles of a compound is calculated by dividing the given mass of the compound by its molar mass.
Moles=MassMolarMass.
Interpretation Introduction
(b)
Interpretation:
The number of molecules present in 3.45 moles of C6H12O6 should be calculated.
Concept Introduction:
According to Avogadro’s number, one mole of a compound contains 6.023×1023 molecules.
Interpretation Introduction
(c)
Interpretation:
The number of molecules present in 25 g of ICl5 should be calculated.
Concept Introduction:
According to Avogadro’s number, one mole of a compound contains 6.023×1023 molecules.
Number of moles of a compound is calculated by dividing the given mass of the compound by its molar mass.
Moles=MassMolarMass.
Interpretation Introduction
(d)
Interpretation:
The number of molecules present in 1g of B2H6 should be calculated.
Concept Introduction:
According to Avogadro’s number, one mole of a compound contains 6.023×1023 molecules.
Number of moles of a compound is calculated by dividing the given mass of the compound by its molar mass.
Moles=MassMolarMass.
Interpretation Introduction
(e)
Interpretation:
The number of molecules present in 1.05 mmol of Al(NO3)3 should be calculated.
Concept Introduction:
According to Avogadro’s number, one mole of a compound contains 6.023×1023 molecules.
4.
a) Give a suitable rationale for the following cyclization, stating the type of process involved
(e.g. 9-endo-dig), clearly showing the mechanistic details at each step.
H
CO₂Me
1) NaOMe
2) H3O®
CO₂Me
2. Platinum and other group 10 metals often act as solid phase hydrogenation catalysts for
unsaturated hydrocarbons such as propylene, CH3CHCH2. In order for the reaction to be
catalyzed the propylene molecules must first adsorb onto the surface. In order to completely
cover the surface of a piece of platinum that has an area of 1.50 cm² with propylene, a total
of 3.45 x 10¹7 molecules are needed. Determine the mass of the propylene molecules that
have been absorbed onto the platinum surface.
Chem 141, Dr. Haefner
2. (a) Many main group oxides form acidic solutions when added to water. For example solid
tetraphosphorous decaoxide reacts with water to produce phosphoric acid. Write a balanced
chemical equation for this reaction.
(b) Calcium phosphate reacts with silicon dioxide and carbon graphite at elevated temperatures
to produce white phosphorous (P4) as a gas along with calcium silicate (Silcate ion is SiO3²-)
and carbon monoxide. Write a balanced chemical equation for this reaction.
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Step by Step Stoichiometry Practice Problems | How to Pass ChemistryMole Conversions Made Easy: How to Convert Between Grams and Moles; Author: Ketzbook;https://www.youtube.com/watch?v=b2raanVWU6c;License: Standard YouTube License, CC-BY