1. Explain the term empirical formula and amolecular formula and state how they twodiffer.2. Write the empirical formulas of the following:(a) H₂O₂= ; (b) C¿H= ; (c) C6H₁2O6 = ;(d) H₂0 = (e) MgO12NaOHg of O3. Calculate the formula mass (a) NaCl =(b) KOHof Cu9=4. What is the percentage of Ag in AgNO35. What is the percentage of C in C12H22O11(Sucrose, Cane Sugar)6. Determine in g the mass of 2.5 moles of=7. How many moles in 0.5 g of Mg; and 0.2of C₂H₂O₂.;8. Determine the number of atoms in 0.8 g9. A substance was found by analysis tocontain 45.57 % of Sn and54.43 % of Cl. Whatis the empirical formula of the substance.10. Ethylene Glycol has a molecular formula(a) Determine its molar mass(b) The percentage compositions of itscomponent's elements(c) The empirical formula of Ethylene Glycol

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1. Explain the term empirical formula and a molecular formula and state how they two differ.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter3: Chemical Reactions

Section: Chapter Questions

Problem 141QRT

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Concept explainers

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.

Question

1. Explain the term empirical formula and a
molecular formula and state how they two
differ.
2. Write the empirical formulas of the following:
(a) H₂O₂= ; (b) C¿H= ; (c) C6H₁2O6 = ;
(d) H₂0 = (e) MgO
12
NaOH
g of O
3. Calculate the formula mass (a) NaCl =
(b) KOH
of Cu
9
=
4. What is the percentage of Ag in AgNO3
5. What is the percentage of C in C12H22O11
(Sucrose, Cane Sugar)
6. Determine in g the mass of 2.5 moles of
=
7. How many moles in 0.5 g of Mg; and 0.2
of C₂H₂O₂.
;
8. Determine the number of atoms in 0.8 g
9. A substance was found by analysis to
contain 45.57 % of Sn and
54.43 % of Cl. What
is the empirical formula of the substance.
10. Ethylene Glycol has a molecular formula
(a) Determine its molar mass
(b) The percentage compositions of its
component's elements
(c) The empirical formula of Ethylene Glycol

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