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Empirical Formula

The document presents various problems related to determining empirical and molecular formulas from percent composition, combustion data, mass data, and elemental analysis. It includes examples of calculating empirical formulas for compounds and hydrates, as well as exploring the relationship between empirical and molecular formulas. The document encourages further exploration of these questions step by step.

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g2401228
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4 views5 pages

Empirical Formula

The document presents various problems related to determining empirical and molecular formulas from percent composition, combustion data, mass data, and elemental analysis. It includes examples of calculating empirical formulas for compounds and hydrates, as well as exploring the relationship between empirical and molecular formulas. The document encourages further exploration of these questions step by step.

Uploaded by

g2401228
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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1.

Empirical Formula from Percent


Composition

A compound contains 40.0% carbon, 6.7%


hydrogen, and 53.3% oxygen by mass.
Determine the empirical formula of the
compound.

2. Empirical Formula and Molecular


Formula Relationship

A compound has an empirical formula of


C,H,O, and a molar mass of 180 g/mol. What
is the molecular formula of the compound?

3. Determining Empirical Formula from


Combustion Data
3. Determining Empirical Formula from
Combustion Data

A 2.00 g sample of a compound containing


carbon, hydrogen, and oxygen is combusted.
The products are 4.40 g of carbon dioxide and
2.02 g of water. What is the empirical formula of
the compound?

4. Empirical and Molecular Formula


from Mass Data

A sample of a compound weighs 5.60 g and


contains 2.40 g of nitrogen and 3.20 g of
Oxygen. The compound's molar mass is 92.0 g/
mol. What is the empirical formula and the
molecular formula of the compound?

5. Empirical Formula of a Hydrate


5. Empirical Formula of a Hydrate

A sample of a hydrate weighing 3.50 g is heated


until all water is driven off. The anhydrous
compound weighs 2.00 g. What is the empirical

formula of the hydrate?

6. Calculating Empirical Formula from


Elemental Analysis

A compound is found to contain 40.0% sulfur


and 60.0% oxygen by mass. Determine its

empirical formula. What additional data would

you need to determine its molecular formula?

7. Determining Empirical Formula from


a Mass Ratio
7. Determining Empirical Formula from
a Mass Ratio

A compound is found to have the following


mass composition: 30.0% nitrogen and 70.0%
oxygen.What is the empirical formula of the
compound? If the molecular mass of the
compound is found to be 92.0 g/mol, what is its
molecular formula?

8.Empirical Formula and Molecular


Formula for a Polymer

A polymerhas a molecular mass of 100,000g/


mol.The empirical formula of the monomer unit

is CçH;O. Determine the molecular formula of


the polymer.

These questions test a range of skills, from


converting mass percentages to moles, to
understanding the relationship between
empirical and molecular formulas. Let me know
if you'd like to work through any of these
questions step by step!
Tungsten

D AKS

MI

CHOOSE TO STUDY AND END UP


WITH WHAT YOU WANTED
DvanCeD
DECISION IS YOUR DESTINY

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