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Gas stoichiometry and Empirical Formula
Related Topics
Wize University Chemistry Textbook > Stoichiometry
Combustion Reactions + Empirical and Molecular Formulae
4 Activities
Complete combustion of a hydrocarbon yields 1.5 L CO
2
and 2 L H
2
O at 298 K and 101 kPa. Whats the empirical formula of the compound?
C
3
H
8
C
4
H
10
C
2
H
6
C
3
H
6
I don't know
Check Submission
More Combustion Reactions + Empirical and Molecular Formulae Questions:
Empirical formula: Combustion reaction
When 2.11 g of an unknown hydrocarbon (compound made up of only carbon and hydrogen atoms) was burned in excess oxygen as part of a combustion analysis. In the process 6.32 g of CO
2
and 3.45 g of H
2
O are produced. What is the mass percent of carbon? What is the empirical formula of the hydrocarbon?
Empirical Formula
A 1.00 g sample of a species containing only C, H, and O was completely combusted in pure oxygen, and 1.5 g CO
2
and 0.41g H
2
O were obtained. What is the empirical formula of the compound?
Combustion and Empirical Formula
A hydrocarbon (0.875 g) containing only C, H, and O yielded 2.21 g CO
2
and 0.387 g H
2
O after complete combustion.
What is the empirical formula?
Combustion, Stoichiometry
What mass of KClO
3
is required to produce proper amount of O
2
needed to achieve complete combustion of 78.88 g CH
4
?
2 KClO
3
→ 2 KCl + 3 O
2
Combustion Analysis Calculation
When 2.11 g of an unknown hydrocarbon (compound made up of only carbon and hydrogen atoms) was burned in excess oxygen as part of a combustion analysis. In the process 6.32 g of CO
2
and 3.45 g of H
2
O are produced. What is the empirical formula of the hydrocarbon?
Stoichiometry 2
An unknown hydrocarbon contains 40.0% C and 6.66% H by weight.
a. What is the empirical formula of the compound?
b. What is the molecular formula if molecular weight of the compound is 180 gmol
-1
?
Empirical Formula
A 1.00 g sample of a species containing only C, H, and O was completely combusted in pure oxygen, and 1.5 g CO
2
and 0.41g H
2
O were obtained. What is the empirical formula of the compound? (enter answer: C_H_O_ For example C2H2O5)
Empirical Formulae
This question focuses on material from 1.3. Empirical Formulae.
Empirical Formulae
3.0 g of an organic compound, C
x
H
y
O
z
, is combusted in air to produce 7.75 g of carbon dioxide and 3.70 g of water vapour. Determine the empirical formula of this compound.
Empirical Formulae
An organic compound, C
x
H
y
Cl
z
, was subject to elemental analysis, and the compound was found to contain 64.6% carbon by mass and 11.5% hydrogen by mass. Determine the empirical formula of this compound.
Mass Percentage Practice
0.2976g of an unknown compound gives 0.3147g of CO2 and 0.3026g of H2O on combustion. The only other element known to be present is N. What is the empirical formula?
Empirical Formulae
5.
5.0 g of an organic compound, C
x
H
y
O
z
, is combusted in air to produce 11.87 g of carbon dioxide and 6.08 g of water vapour. Determine the empirical formula of this compound.
Empirical formula: Combustion reaction
When 2.11 g of an unknown hydrocarbon (compound made up of only carbon and hydrogen atoms) was burned in excess oxygen as part of a combustion analysis. In the process 6.32 g of CO
2
and 3.45 g of H
2
O are produced. What is the empirical formula of the hydrocarbon?
Combustion Analysis
For a hydrocarbon (a molecule made up of only C and H atoms) combustion analysis allows us to determine the: