Calculate the number of molecules of gaseous product obtained on heating 8.8g of CO(2) with coke if the conversion of CO(2) is 80% by mass.
Answers
Answer:
1. Introduction
As we have learned about the units and various conversions, it’s time that we start using them. Before
starting with the core calculations, we need to know the laws which have been formulated with the help
of the facts known from experimental evidences. So now, get ready to play.
2. Dalton’s Atomic Theory
Flowchart 1.1: Postulates of Dalton theory
1.2 Mole Concept and Stoichiometry
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PLANCESS CONCEPTS
Many unexplained chemical phenomena were quickly explained by Dalton with his theory.
Dalton’s theory quickly became the theoretical foundation in chemistry.
Vipul Singh
AIR 1, NSTSE 2009
2.1 Law of Conservation of Mass
A. Lavoisier in 1789 introduced the concept of mass conservation. He stated that “In all physical changes
and chemical reactions, the total mass of the products is the same as the total mass of the reactants.” He
is considered as “Father of Modern Chemistry”.
Modication to the Law of Conservation of mass
e total sum of mass and energy of the system remains constant.
PLANCESS CONCEPTS
e above law will remain constant over time, provided the system is isolated.
A similar statement is that mass cannot be created/destroyed, although it may be rearranged
in space, and changed into dierent types of particles.
Sir Lavoisier was the one who coined the word “oxygen” meaning “acid former” and came up
with the combustion process through his experiment.
Vipul Singh
AIR 1, NCO
2.2 Law of Definite Proportions or Constant Composition
Law of Constant Composition was given by Sir Joseph Proust in 1799, e law states that “A pure
chemical compound always consists of the same elements combined together in a xed (denite)
proportion by weight.”
Illustration 1: e mass of copper oxide obtained by heating 2.16 g of metallic copper with nitric acid
and subsequent ignition was found to be 2.7 g. In another experiment, 1.15 g of copper oxide on
reduction yielded 0.92 g of copper. Show that the data illustrates the law of constant compositio
Explanation: