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- 1. Multiple Choice24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?74.92 amu24.97 amu75.01 amu74.51 amu - 2. Multiple ChoiceCalcium has three different isotopes. One has a mass of 35.00 amu; another has a mass of 41.00 amu; and another has a mass of 40.00 amu. Which isotope is the most abundant of the three?40.00 amu41.00 amu35.00 amuimpossible to tell
- 3. Multiple Choice
Calculate the average atomic mass of an element with the follow isotope information: 4.35% have a mass of 49.9461 amu, 83.79% have amass of 51.9405 amu, 9.50% have a mass of 52.9407 amu, and 2.36% have a mass of 53.9389 amu.
51.99 amu
52.19 amu
53.45 amu
17.33 amu
- 4. Multiple Choice4.35% of all X atoms have a mass of 39.946 amu. 83.79% have a mass of 41.941 amu, 9.50% have a mass of 42.941 amu, and 2.36% have a mass of 43.939 amu. What is the average atomic mass of atom X?41.97 amu42.19 amu10.43 amu40.04 amu
- 5. Multiple ChoiceAn element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?9.012, Beryllium12.011, Carbon6.941, Lithium10.812, Boron
- 6. Multiple ChoiceNitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Which isotope is the most abundant?Nitrogen-13Nitrogen-14Nitrogen-15Based on the information given, it cannot be determined
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