How To Calculate Relative Molecular Mass Molecular mass of silver nitrate 1 Ag 1 N 3 O 1 108 1 14 3 16 170 u Equivalent weight Molecular mass of silver nitrate Valency Valency is the magnitude of total charge present on the cation or anion It is equal to 1 Hence Equivalent weight Molecular mass of silver nitrate 170 u Q 15 Do all molecules have molecular mass
The relative molecular mass relative formula mass is defined as the sum of all the individual atomic masses of ALL the atoms in the formula Mr for ionic compounds e g NaCl 23 35 5 58 5 or molecular mass for covalent elements or compounds e g Mr of N2 28 from 2 x 14 e g Mr of C6H12O6 180 from 6 x 12 12 x 1 6 x 16 Example 1 What is the molar mass of sodium carbonate Na 2 CO 3 Solution Since sodium carbonate contains two atoms sodium one atom of carbon and three atoms of oxygen The molecular weight would be Na 2 x 23 0 46 C 1 x 12 0 12 O 3 x 16 48 When we add up the total values i e 46 12 48 106
How To Calculate Relative Molecular Mass
How To Calculate Relative Molecular Mass
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a Calculate The Relative Molecular Mass Of Water H2O b Calculate
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Halle oWoodward
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The molecular mass of chlorine Chlorine exists as a diatomic molecule that is Cl 2 Atomic mass of Chlorine 35 5 Atomic mass of Hydrogen 1 Molecular Mass of Cl 2 Atomic mass of chlorine x 2 35 5 215 2 71 g mol Hence Molecular mass of NH 3 17g mol Molecular mass of CO 2 44 g mol Molar mass of HCl 36 5 g mol Molecular mass Molecular mass of an element is defined as the sum of the masses of the elements present in the molecule Molecular mass is obtained by multiplying the atomic mass of an element with the number of atoms in the molecule and then adding the masses of all the elements in the molecule Let us see an example carbon dioxide
Q Calculate the molar mass of Nitric acid H N O 3 Q Calculate the molecular mass of Nitric acid H N O 3 Q Calculate the molar mass of the following substances Relative molecular mass The sum of all the relative atomic masses of the atoms in a molecule the ratio of the average mass per molecule of a specified isotopic composition of a substance to one twelfth the mass of an atom of carbon 12 Symbol M r Abbreviation r m m Also known as molecular weight Percentage composition of a compound
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Calculate the relative molecular masses of a CHCl3 b NH42Cr2O7 c CuSO4 5H2O d NH42SO4 e CH3COONa f Potassium chlorate g Ammonium chloroplatinate NH42PtCl6 The unit in which molecular mass is measured is amu amu stands for atomic mass units Molar mass It is defined as the mass of substance for a given amount The amount of molecules or atoms or compounds present in one mole of substance is given by this Molar mass SI unit is g mol To make you understand how molar mass and Molecular mass are
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