Asked Oct 5, 2019

 An unknown compound contains only C , H , and O . Combustion of 2.60 g of this compound produced 5.19 g CO2 and 2.13 g H2O . What is the empirical formula of the unknown compound? Insert subscripts as needed.



Expert Answer

Step 1


Elements present = C, H , O

Mass of sample = 2.60g

Mass of CO2 = 5.19 g

Mass of H2O = 2.13 g

Empirical formula = CHO

Step 2

Find the mass of each element:

Mass of C in CO2 :

12 g of C is present in 44 g of CO2

? g of C in 5.19 g ?

5.19 g X 12 / 44 = 1.41

Mass of H in water :

From the formula of water,

2g of H is present in 18g of water

? g of H in 2.13 g of water?

2.13 X 2 / 18 = 0.236

Mass of O:

Mass of O = total mass of...

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: Answer the question in the correct amount of significant Figures (12.345+13.45 )2 - 1.0

A: Given,(12.345+13.45 )2 - 1.0


Q: The 1875 Chamber Street fire claimed many victims. A whiskey distillery in Dublin went into flames a...

A: It is required to calculate the required amount of whiskey to succumb to alcohol poison, which can b...


Q: Which method can be used to determine the percentage of sugar in a sample of apple juice which conta...

A: Fructose, a group or a member of carbohydrates known as simple sugars. Glucose and fructose together...


Q: Write the formula of the following ionic compound   Chromium(III) oxalate ( two Cr3+ ions and three ...

A: Click to see the answer


Q: Please answer question 7

A: A compound contains amino and acid that compounds are called as amino acid.To identified the amino a...


Q: A solution is made by mixing 13.g of water and 73. g of acetone ((CH3)2CO). Calculate the mole fract...

A: To calculate mole fraction of water, it is required to calculate the moles of water and acetone whic...


Q: What was the initial energy level of an electron if it emitted a photon of wavelength 0.103µm after ...

A: Initial energy level of an electron can be determined using Rydberg equation as follows,


Q: What are two primary standards that can be used to standardize base solutions other than KHP and wri...

A: Primary standards are reagents that are used for determining the concentration of the unknown. Prima...


Q: Saved Determine if the organic substrate is oxidized or reduced in the following reaction. Select th...

A: Hydrogenation of an Alkyne to an Alkene (trans-alkene):Alkynes can be reduced to trans-alkenes with ...