# Q1 M5 SHS_GENERAL-CHEMISTRY-1_Empirical-and-Molecular-Formula.pdf

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1City of Good CharacterDISCIPLINEGOOD TASTE• EXCELLENCEWriter:Coleen Michelle L. MagalongCover Illustrator:Christine Ann G. FaraonGeneral Chemistry 1First Quarter-Module 5:Empirical and Molecular FormulaDepartment of EducationNational Capital RegionSCHOOLS DIVISION OFFICEMARIKINA CITY
This module was designed and written with you in mind. It is here to help youmaster the concepts and ideas in Chemistry. The scope of this module permits it tobe used in many different learning situations. The language used recognizes thediverse vocabulary level of students. The lessons are arranged to follow the standardsequence of the course.Learning CompetenciesCalculate the empirical formula from the percent composition of acompound (STEM_GC11PCIf-32).Calculate molecular formula given molar mass (STEM_GC11PCIf-33).After going through this Lesson, you are expected to1.define percent composition, empirical, and molecular formula;2.determine the formula mass of a compound;3.describe steps in calculating percent composition of a compound; and4.explain the steps in determining the empirical formula of a compound.Read each questions carefully. Choose the letter of the best answer then write youranswers on a separate sheet of paper.1.Which of the following gives the actual number of atoms present in achemical compound?What I KnowWhat I Need to Know
2.Which of the following is an example of a molecular formula?
1City of Good CharacterDISCIPLINEGOOD TASTE• EXCELLENCE
3.Which of the following is an example of an empirical formula?
4.What is the correct molecular weight of NH3?A.17 g/molB.18 g/molC.19 g/molD.20 g/mol
5.What is the molar mass of barium perchlorate, Ba (ClO4)2?
6.A compound has a molecular formula of C12H24O6. What is its empiricalformula?
7.In a 100 g sample of a substance, 85.6% is carbon and 14.4% is Hydrogen.How much carbon in grams is in the sample of substance?
2City of Good CharacterDISCIPLINEGOOD TASTE• EXCELLENCE

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