# Tag Archives | formula

## How will you identify a hydrocarbon from its formula ?

Look atomic the given formula of the hydrocarbon and find out the (a) number of carbon atoms and (b) number of hydrogen atoms and proceed as follows:

By |2011-01-01T08:39:12+00:00January 1, 2011|Chemistry|Comments Off on How will you identify a hydrocarbon from its formula ?

## How is the formula mass of an ionic substance calculated ?

For ionic compound, such as, sodium chloride, there is no discrete individual molecule. Instead, these are the aggregates represented by a formula of the type..

By |2010-12-28T17:32:51+00:00December 28, 2010|Chemistry|Comments Off on How is the formula mass of an ionic substance calculated ?

## What is the significance of a molecular formula ?

A molecular formula is the shorthand notation of a substance. For example, carbon dioxide is written as CO2. The formula CO2 is much shorter than the name carbon dioxide.

By |2010-12-28T17:08:34+00:00December 28, 2010|Chemistry|Comments Off on What is the significance of a molecular formula ?

## What is the significance of an empirical formula ?

Empirical formula of a substance represents mass of the substance equal to the formula mass of the substance. The formula mass of the substance is equal to the sum of the atomic masses of all the atoms present in the empirical formula.

By |2010-12-28T17:05:25+00:00December 28, 2010|Chemistry|Comments Off on What is the significance of an empirical formula ?

## How is the empirical formula of a substance related to its molecular formula ?

The molecular formula of a compound is related to its empirical formula as follows: Molecular formula = n × Empirical formula, where, n may be 1, 2, 3 …  thus the value of n can be obtained by the following relationship.

By |2010-12-28T16:52:41+00:00December 28, 2010|Chemistry|Comments Off on How is the empirical formula of a substance related to its molecular formula ?

## How to determine the formula of an unknown compound ?

The chemical formula of a compound can be determined from the composition of the compound. The composition of a compound is commonly expressed in terms of percentage of each element present in it.

By |2010-12-28T16:51:25+00:00December 28, 2010|Chemistry|Comments Off on How to determine the formula of an unknown compound ?
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