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- 1. Multiple Choice
Calculate the average atomic mass of silver.
106.38649amu
111.91896amu
107.8677amu
121
- 2. 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
- 3. Multiple ChoiceCompute the average atomic mass for silicon:27.97728.0928.976The average mass cannot be determined from provided information.
- 4. Multiple ChoiceAn isotope has three forms. 30% have a mass of 4 amu, 20% have a mass of 5 amu and 50% have a mass of 3 amu. Average atomic mass will be closest to2 amu3 amu4 amu5 amu
- 5. 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 - 6. 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
- 7. Multiple Choice
Magnesium exists as the three isotopes shown. What is the average atomic mass of magnesium?
20.74 amu
22.56 amu
18.39 amu
24.31
- 8. Multiple Choice
Naturally occurring chlorine that is put in pools is 75.53 percent 35Cl (mass = 34.969 amu) and 24.47 percent 37Cl (mass = 36.966 amu). Calculate the average atomic mass.
35.46 amu
35.00 amu
37.00 amu
17.00 amu
- 9. Multiple ChoiceAn element with 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 53.9389amu.51.99 amu52.19 amu53.45 amu17.33 amu
- 10. Multiple ChoiceAn element with 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 53.9389amu.51.99 amu52.19 amu53.45 amu17.33 amu
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