Asked Jun 13, 2019

provide an example of how to calculate empirical formula and then how to find molecular formula from this


Expert Answer

Step 1

In the determination of molecular formula, first step is the determination of its empirical formula.


Image Transcriptionclose

Mass of A atomsDivide by Moles of A atoms molar mass A to B mole ratio Divide by lowest number of moles Mass of B atoms Moles of B atoms Divide by molar mass Convert ratio to lowest whole numbers Empirical formula

Step 2

Take Nicotine as an example, and assume it contains 74.02 % C, 8.710 % H, and 17.27% N.  Consider, 40.57 g of Nicotine consists of 0.25 mol Nicotine.

First, calculate the moles of each element,


Image Transcriptionclose

(74.02gCImol C6.163mol C 12.01g C (8.710 g HImolH8.624molH 1.01g H (17.27gN mol N1.233mol Nn 14.01g C

Step 3

Calculate the molar ratio...


Image Transcriptionclose

6.163mol C/1.233mol N = 5 8.264molH 1.233molN = 7 1.233 mol C/1.233 molN =1


Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in



General Chemistry

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A

Q: How much NaOH (in moles) must be added to 1 L of a buffer solution that a 1.8 M in acetic acid and 1...

A: A buffer solution is that solution which resists the change in its pH when small amount of acid or b...


Q: Calculate the molar solubility of calcium hydroxide in a solution buffered at a pH of 4.0

A: Calcium hydroxide is an ionic compound which dissociates in aqueous solution. Ca(OH)2 <-------&gt...


Q: Consider the reactionCaCO3(s)CaO(s)+ CO2(g)Using the standard thermodynamic data in the tables linke...

A: The decomposition of calcium carbonate results in the formation of calcium oxide and carbon dioxide ...


Q: What is the function of the enzyme helicase in DNA replication?

A: What is DNA?Deoxyribonucleic acid (DNA) is the molecule found in organisms which carry the genetic i...


Q: 1. What is the formula mass of barium phosphate, Ba3(PO4)2? 506.95 amu 570.95 amu 232.30 amu 1013.90...

A: Sum of the atomic masses of the atoms in a molecule is molecular mass.


Q: How many atoms are in one molecule of Na2SO4? How many different elements are in the compound C6H12O...

A: The compound Na2SO4 contains two sodium atoms, one sulfur atom and four oxygen atoms in its chemical...


Q: 15. This dipeptide is designated as: 0 O H3N-CH-CNH-CH-C-o CH2 CH2 OH SH a. Ser-Lys b. Ser-Cys c. Cy...

A: Amino acids are known to be the building blocks of these proteins. Each amino acid when present in i...


Q: A researcher is studying the decomposition of A as shown by the general reaction below: 3 A(g) 2 B(s...

A: The equilibrium constant of given reaction is determined as,


Q: What is the chemical reaction when completing extraction experiment and using 100mg Benzoic Acid, 2m...

A: The mixture of the Benzoic acid in 2ml of water and Dichloromethane, the benzoic acid organic it is ...