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Chemistry Midterm 3 - Chemistry Midterm 3(answers bolded 1...

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Chemistry Midterm 3 (answers bolded) 1. A compound contains the elements Ca and F. Analysis indicates that a 2.00 g sample of the compound contains 0.83 g of calcium. Calculate the mass of fluorine in the sample. Do not enter units with your answer. Student Response Correct Answer Answer: 1.17 1.17 2. What set of the elements below includes just the nonmetals? Ga, P, I, Ra, Li, La, Xe Student Response Correct Answer A. P, I, Xe B. P, I, La C. I, Xe D. Ga, P, Xe, E. P, I 3. Suppose the element A contains three isotopes, 86 A (atomic mass 85.909 u, abundance 25.30%) 87 A (atomic mass 86.908, abundance 7.00%) and 88 A (atomic mass 87.906 u). What would be the atomic mass of A that would appear in the periodic table? Do not enter units with your answer. Answer: 4. Predict the product formed when calcium, Ca, combines with arsenic, As?
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5. What is the formula of tetraphosphorus nonasufide? Enter your answer with atomic symbols and numbers, such as A2B3, without any spaces. Do not include the number "1" in any formula.
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