Question
Asked Dec 11, 2019
16 views

A compound containing only C, H, and O, was extracted from the bark of the sassafras tree. The combustion of 82.3mg produced 223mg of CO2and 45.8mg of H2O. The molar mass of the compound was 162 g/mol. Determine its empirical and molecular formulas.

(For this problem use the format: CxHyOz, where x, y, and z are subscripts of 2 or greater.)

Thank you

 

 

check_circle

Expert Answer

star
star
star
star
star
1 Rating
Step 1

Given that the mass of CO2 and H2O formed by the burning of 82.3 mg of compound is 223 mg and 45.8 mg respectively.

The mass of Carbon, Hydrogen and oxygen can be calculated using the simple mole concept.

help_outline

Image Transcriptionclose

ImolCO,, 12gC Massof C=223 ×10° gCO,× -=0.061g C 1mol CO, 44g Massof H=45.8×10-°9xImolH,0 18g 2gH =5.09×10³gH ImolH,0 Mass of O=Total mass – (mc+mµ. = 82.3 x10°g - (0.061g+ 5.09 x10°g ) %3D = 0.016 g %3D

fullscreen
Step 2

Number of moles of Carbon, Hydrogen and oxygen can be calculated by the equation given below:

help_outline

Image Transcriptionclose

Mass No.of moles of C=- Atomic mass 0.061g -=5.08 x10- mol 12g/mol 5.09 x10 ´g – 5.09×10³mol H= 1g/mol No.of moles of 0.016 g No.of moles of O=. =1x10-³ mol 16g/mol

fullscreen
Step 3

In-order to get the empirical formula, first the number of moles has to be divided with the lowest...

help_outline

Image Transcriptionclose

Dividing by thelowest integer,1x 10-3 5.08 x103 C: 5.09 x103 Н: 1x103 =1 1×10-3 =5 =5; 0 :- 1x10-3 1x10-3 Emperical formula=C,H,O

fullscreen

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

Science

Chemistry

General Chemistry

Related Chemistry Q&A

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

Q: A student was given a 0.15 M solution of an unknown diprotic acid H2A and asked to determine the Ka1...

A: The first acid dissociation constant of diprotic acid is calculated as,

question_answer

Q: A solution is prepared by adding 4.512 g of slaked lime also known as calsium hydroxide to 500.00 mL...

A: The molarity or the concentration can be defined as the ratio of number of moles of solute which are...

question_answer

Q: Excited mercury atoms emit light strongly at a wavelength of 428 nm. a. Calculate the frequency of t...

A: Given,Wavelength = 428 nm

question_answer

Q: The vapor pressure of ethanol is 115 torr at 308 K.  The boiling point of ethanol is 351.5 K. Estimt...

A: The expression for Clausius Clapeyron equation is expressed in equation (1) in which P1 and P2 are t...

question_answer

Q: b Answered:E Enthalpy - Chemistry x 101 Chem101 app.101edu.co Submit Question 21 of 29 Using the equ...

A: Given information:

question_answer

Q: Calculate the standard enthalpy of formation of solid Ca(OH)2, given the following data: Ca(s) + O2(...

A: Given,

question_answer

Q: Whereas all pure elements in their standard states are defined as having a standard molar enthalpy o...

A: A standard enthalpy is defined as the amount of energy released or gained when 1 mole of a substance...

question_answer

Q: You are given a small bar of an unknown metal, M. You find the density of the metal to be 10.5 g/cm³...

A: A face centered cubic structure consists of atoms that are located at each of its corners and the ce...

question_answer

Q: Question 3

A: The intermolecular distances between the gas particles are greater. Gas has no definite shape or vol...