Answered: An imaginary element Saturnium, St,…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

An imaginary element Saturnium, St, consists of two isotopes having masses of 101.0 amu and 104.0 amu. A sample of Saturnium was found to contain 60.0% of the St-101. What is the atomic mass of Saturnium?

A) 102.5 amu
B) 102.2amu
C) 104.0 amu
D) 102.8 amu
E) missing information

Expert Solution

Step 1

Recall the relation to calculate atomic mass of Saturnium as follows

$A t o m i c m a s s o f S a t u r n i u m = \frac{(% o f S t - 101) \times (m a s s o f i s o t o p e S t - 101) + (% o f S t - 104) \times (m a s s o f i s o t o p e S t - 104)}{100} H e r e, m a s s o f i s o t o p e S t - 101 i s 101.0 a m u a n d m a s s o f i s o t o p e S t - 104 i s 104.0 a m u % o f i s o t o p e S t - 101 i s 60.0 % S o, % o f i s o t o p e S t - 104 i s = (100 - 60.0) % = 40.0 %$

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