break l Down x Download Download Jailbreak foria SO Homework -201520 c Bold Domi

Question

break l Down x Download Download Jailbreak foria SO Homework -201520 c Bold Dominion University QUESTION 1 Without doing calculations answer the following chlorine exists as two isotopes 37 and 35cl with masses of 36.97 amu and 3497 amu respectively. Chlorine has an average mass of35.45 amu. Which statement is corerot? 35ct is more abundant in nature than 37CI Nothing can be said about the abundances of 35CI and 37cl without more information. o 35c has approximately the same abundance as 37CI O 37 is more abundant in nature than 35CI Cl QUESTION 2 A ficticious element has three isotopes. What is its average atomic mass? Isotope 1. Mass 98.92 amu Abundance 46 18 Isotope 2 Mass 96.84 amu Abundance 39.47% Isotope 3 Mass 94.48 amu Abundance 14.35 Click Save and submit to save and submit. ClickSaveAMAnswers to save allanswers. EE Search the web and Windows

Explanation / Answer

average atomic mass = 36.97*x + 34.97*(100-x)

35.45 = (36.97*x) + (34.97*(1-x))

x = 0.24

percentage 37Cl isotope = 0.24*100 = 24%

percentage 35Cl isotope = 100-24% = 76%

so that

answer: 35Cl is more abundant in nature than 37 Cl

Question 2:

avg atomicmass = (98.92*46.18+96.84*39.47+94.48*14.35)/100

     = 97.46 amu

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