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An element with relative atomic

An element with relative atomic mass 20.8 is found to contain 2 isotopes having a relative atomic mass of 20 and 21.Find the %
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2. asked by Luc
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Element X has three isotopes, ^22X, ^23X, and ^25X. The relative abundances are 60%, 35%, and 5% respectively. What is the
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2. asked by KahJiah
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A newly discovered element consists of 2 isotopes, one with a mass of 9.5 and a relative abundance of 17.2% and another with a
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2. asked by Muneer
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if one mole of the compound Al4C3 has a mass of 144g and one mole of carbon has a mass of 12g, calculate the relative atomic
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2. asked by smartypants
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What information is needed to calculate the average atomic mass of an element?(1 point)Responses the relative abundance of its
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name the element wsith the atomic number z= 15 and the atomic mass number 31.How many electrons does the neutral of this lement
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2. asked by CHEMISTRY
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What information is needed to calculate the average atomic mass of an element?A. the charge on each isotope B. the relative
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Lithium has 2 isotopes. The relative atomic masses are 6.02 and 7.02. The average relative atomic mass of lithium is 6.94. What
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2. asked by Min
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What information is needed to calculate the average atomic mass of an element? (1 point)the number of protons in each isotope
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2. 24 views
What information is needed to calculate the average atomic mass of an element?A. The relative abundance of its isotope** B. The
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2. asked by HELP PLEASE!
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