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- 1. 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
- 2. 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
- 3. Multiple Choice
Calculate the average atomic mass of silver.106.38649amu111.91896amu107.8677amu121 - 4. Multiple Choice__ Al + __ FeO → Al2O2 + __ Fe1, 1, 22,1,22, 2, 22,4,2
- 5. Multiple ChoiceBalance this equation-
_SeCl6+_O2>_SeO2+_Cl21,2,1,21,1,1,31,2,1,12,1,1,1 - 6. Multiple ChoiceBalance this equation.
_N2+_O2->_H2O+_HNO3not possible2,2,1,22,1,1,42,2,1,4 - 7. Multiple ChoiceBalance this equation.
_CH4 + _O2 --> _CO2 + _H2O1,2,1,12,1,2,11,2,1,20,2,0,2 - 8. Multiple ChoiceIs the equation balanced?: 2H2O + O2 --> 4MgO + 3FeYesNo
- 9. Multiple ChoiceBalance this equation-
__P4 + __O2 --> __P2O3it is already balanced2, 1, 31, 2, 31, 3, 2 - Answer choicesTagsAnswer choicesTags