   # When a sample of phosphorus burns in air, the compound P 4 O 10 forms. One experiment showed that 0.744 g of phosphorus formed 1.704 g of P 4 O 10 . Use this information to determine the ratio of the atomic weights of phosphorus and oxygen (mass P/mass O). If the atomic weight of oxygen is assumed to be 16.000, calculate the atomic weight of phosphorus. ### 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 2, Problem 108GQ
Textbook Problem
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## When a sample of phosphorus burns in air, the compound P4O10 forms. One experiment showed that 0.744 g of phosphorus formed 1.704 g of P4O10. Use this information to determine the ratio of the atomic weights of phosphorus and oxygen (mass P/mass O). If the atomic weight of oxygen is assumed to be 16.000, calculate the atomic weight of phosphorus.

Interpretation Introduction

Interpretation:

The ratio of atomic weights of phosphorus and oxygen and the atomic weight of phosphorus are needed to be calculated.

Concept introduction:

Mass of a compound is the sum of the mass of all the atoms present in the compound.

### Explanation of Solution

The mass of phosphorus and P4O10 in the experiment are given as 0.744g and 1.704g respectively.

Therefore,

The mass of oxygen present in the P4O10 is,

1.704g0.744g=0.96g

There are 4P and 100 atoms in P4O10, the mass of 4P and 6O atoms are 0

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