Question 1: A fictitious element has two isotopes and a molar mass of 82.43 g/mol. The first isotope has an atomic mass of 80.98 u and 22.65% of this element's atoms are of the first isotope. What is the atomic mass (in u) of the second isotope?

Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter21: The Chemistry Of The Main Group Elements
Section: Chapter Questions
Problem 98GQ
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Question 1:
A fictitious element has two isotopes and a molar mass of 82.43 g/mol. The first isotope has an atomic mass of 80.98 u and 22.65% of this element's atoms are of the first isotope. What is the atomic mass (in u) of the second isotope?
Question 2:
In the combustion of butanol (CH 00), what mass (in g) of butanol must react to produce 55.4 g of product? N.B. Combustion is the reaction of a substance with molecular oxygen (O2) to produce water and carbon dioxide.
Question 3 :
328.8 g SO2(g), 425.3 g CaCO3(s), and 105.7 g 02(g) react as follows:
2 SO2(g) + 2 CaCO3 (s) + 02(g) ---> 2 CaSO4(s) + 2 CO2(g)
What mass (in g) of CaSO4(s) is produced?

 

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