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# Samples of several compounds are decomposed, and the ## Problem 89P Chapter 6

Introductory Chemistry | 5th Edition

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Problem 89P

Samples of several compounds are decomposed, and the masses of their constituent elements are measured. Calculate the empirical formula for each compound.

(a) 1.245 g Ni, 5.381 g I

(b) 1.443 g Se, 5.841 g Br

(c) 2.128 g Be, 7.557 g S, 15.107 g O

Step-by-Step Solution:
Step 2 of 3

Solution 89P

Step-1:

(a) 1.245 g Ni, 5.381 g I

Atomic weight of Ni =58.69 g/mol    , atomic weight of I= 126.90 g/mol

For Ni the number of moles = 1.245/58.69 = 0.0212131539

For I the number of moles = 5.381/ 126.90 = 0.0424034673

The empirical formula can be calculated  by divide both values with the lower value: 0.0212131539

Ni = 0.0212131539/0.0212131539 = 1

I    = 0.0424034673/0.0424034673 = 1.99

Round to the nearest whole numbers to find the empirical formula: NiI2

Step 2:

(b)1.443 g Se, 5.841 g Br

Atomic weight of Se =78.96 g/mol    , atomic weight of Br= 79.90 g/mol

For Se the number of moles  = 1.443/78.96 = 0.018275076

For Br the number of moles = 5.841/ 79.90 = 0.0731038798

The empirical formula can be calculated  by divide both values with the lower :  0.0731038798

Se = 0.018275076/0.018275076= 1

Br = 0.0731038798/0.018275076 = 4

Thus the empirical formula is SeBr4.

Step 3 of 3

##### ISBN: 9780321910295

This full solution covers the following key subjects: calculate, compound, compounds, constituent, decomposed. This expansive textbook survival guide covers 19 chapters, and 2045 solutions. Introductory Chemistry was written by and is associated to the ISBN: 9780321910295. The answer to “Samples of several compounds are decomposed, and the masses of their constituent elements are measured. Calculate the empirical formula for each compound.(a) 1.245 g Ni, 5.381 g I(b) 1.443 g Se, 5.841 g Br(c) 2.128 g Be, 7.557 g S, 15.107 g O” is broken down into a number of easy to follow steps, and 43 words. Since the solution to 89P from 6 chapter was answered, more than 380 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 89P from chapter: 6 was answered by , our top Chemistry solution expert on 05/06/17, 06:45PM. This textbook survival guide was created for the textbook: Introductory Chemistry, edition: 5.

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