   # You add 0.255 g of an orange, crystalline compound whose empirical formula is C 10 H 8 Fe to 11.12 g of benzene. The boiling point of the benzene rises from 80.10 °C to 80.26 °C. What are the molar mass and molecular formula of the compound? ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

#### Solutions

Chapter
Section ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 13, Problem 41PS
Textbook Problem
100 views

## You add 0.255 g of an orange, crystalline compound whose empirical formula is C10H8Fe to 11.12 g of benzene. The boiling point of the benzene rises from 80.10 °C to 80.26 °C. What are the molar mass and molecular formula of the compound?

Interpretation Introduction

Interpretation: The molar mass and its molecular formula of the compound has to be determined.

Concept introduction:

Colligative properties: Properties of solutions which having influence on the concentration of the solute in it. Colligative properties are,

• Decrease in the vapor pressure
• Increase in the boiling point
• Decline in the freezing point
• Osmotic pressure

Change in boiling point is calculated by using the equation,

ΔTbp=Kbpmsolute

where,

Kbp is the molal boiling point elevation constant.

The number of moles of any substance can be determined using the equation

Numberofmole=GivenmassofthesubstanceMolarmass

### Explanation of Solution

The molar mass and its molecular formula of the compound are determined.

Given,

ΔT=(80.260C80.100C)=0.160C

Mass of orange crystalline compound is 0.255g

Mass of benzene is 11.12g=0.01112kg

Molal boiling point elevation constant of benzene is 2.530C/m

Change in boiling point is calculated by using the equation,

ΔTbp=Kbpmsolute

Hence,

The concentration is calculated by,

Concentration,msolute=ΔTbpKbp=(0.160C)(2.530C/m)=0.06324m

The amount of compound dissolved is,

(0.06324mol1kg)(0.01112kg)=7

### Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

#### The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Find more solutions based on key concepts
Osteoporosis occurs during the late years of life; however, it is a disease that develops while one is young. C...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

What is the purpose of significant figures?

An Introduction to Physical Science

Distinguish between acids and bases. What are their properties?

Biology: The Dynamic Science (MindTap Course List)

Describe diffusion in terms or entropy.

Biology: The Unity and Diversity of Life (MindTap Course List)

A point charge +2Q is at the origin and a point charge Q is located along the x axis at x = d as in Figure P22....

Physics for Scientists and Engineers, Technology Update (No access codes included) 