Calculate based on the relative abundance of the three main isotopes of silicon the average atomic...
Calculate based on the relative abundance of the three main isotopes of silicon the average atomic mass of Siand compare your results with value in table elements
(28Si(92.2%), 29Si(4.7%), (30Si(3.1%))
Homework Answers
average atomicmass of sI = (28-si mass*percentage +
29-Si mass*percentage+30-si mass*percentage)/100
=
(28*92.2+29*4.7+30*3.1)/100
= 28.11 amu
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Calculate based on the relative abundance of the three main
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What is the mass, in grams, of 9.41 • 10^24
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The atomic mass of magnesium on the periodic table is based on three isotopes, ^24_12Mg, ^25_12Mg, and^26_12Mg. If a fourth isotope is discovered, it would change the abundances of all the others, and it would change the molar mass listed on the periodic table. Calculate the molar mass of magnesium, based on the masses and abundances given below.[^23_12Mg mass = 22.9862, abundance 22.50%] [^24_12Mg mass = 23.9850, abundance 62.49%] [^25_12Mg mass = 24.9858, abundance 10.20%]^26_12Mg mass = 25.9826, abundance 4.810%]
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What is the mass, in grams, of 9.41 • 10^24
Naturally occurring silicon consists of three isotopes with the following isotopic masses and abundances: Isotope Isotopic mass Abundance (%) 28si 27.9769265327 92.2297 29si 28.97649472 4.6832 30si 29.97377022 3.0872 Calculate the average atomic mass of naturally occurring silicon to at least four significant figures. Number a mu 200 How many photons are produced in a laser pulse of 0.720 J at 615 nm? photons: TOOLS x70
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7. There are three isotopes of silicon. They have mass numbers of 28, 29 and 30. The average atomic mass of silicon is 28.086amu. What does this say about the relative abundances of the three isotopes? 8. Calculate the average atomic mass of bromine. One isotope of bromine has an atomic mass of 78.92amu and a relative abundance of 50.69%. The other major isotope of bromine has an atomic mass of 80.92amu and...
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