Define formula mass of a compound

The idea of equivalent mass to compare chemically different elements! But how can we equate such elements? It's like balancing two different compounds which are chemically dissimilar, which is similar to adding \(2\) oranges and \(3\) apples! But in the world of chemistry nothing is impossible. If you don't get it, here's something which might help. Consider the following compounds: • \(\ce,\] just as we do in equivalent mass: All elements combine with each other according to the equivalent mass of the element. Equivalent mass, as said earlier, depends upon the valency of the element. The formula to calculate the equivalent mass of an element is given by \[\text\] So far we have deduced the methods to find the equivalent mass of elements. Now, let us take this a step further and find out the methods to formulate the equivalent mass of compounds. 1. Equivalent Mass of Acids An which can be replaced by a metal in an acid gives us the Find the basicity of the following acids: \(\ce\) as one equivalent each of an acid and a base have reacted to form the salt. If \(x\) grams of a metal gives \(y\) grams of its oxide, the equivalent mass of the metal (in grams) is \(\text.\]

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Learning Outcomes • Calculate formula masses for covalent and ionic compounds • Define the amount unit mole and the related quantity Avogadro’s number • Explain the relation between mass, moles, and numbers of atoms or molecules, and perform calculations deriving these quantities from one another We can argue that modern chemical science began when scientists started exploring the quantitative as well as the qualitative aspects of chemistry. For example, Dalton’s atomic theory was an attempt to explain the results of measurements that allowed him to calculate the relative masses of elements combined in various compounds. Understanding the relationship between the masses of atoms and the chemical formulas of compounds allows us to quantitatively describe the composition of substances. Formula Mass Earlier, we described the development of the atomic mass unit, the concept of average atomic masses, and the use of chemical formulas to represent the elemental makeup of substances. These ideas can be extended to calculate the formula mass of a substance by summing the average atomic masses of all the atoms represented in the substance’s formula. Molar Mass for Covalent Substances Referring back to molar mass of an element is the mass in grams of 1 mole of that substance, a property expressed in units of grams per mole, which is equivalent to the atomic mass of that element. We can extend this concept to the molar mass of a compound, which is the mass in grams of 1 mole of that m...