Final Exam Chem. 121

sound {Ans: Non matter}Chapter 2 Exam {Ans: }Chapter 1 Exam {Ans: }Pizza {Ans: Matter}Silver {Ans: Matter}Air {Ans: Matter}Three substances present, one phase present {Ans: Homo}In which of the following pairings is the chemical formula not consistent with the ions shown? A) M2+, X3-, M3X2 B) M2+, X-, MX2 C) M+, X3-, MX3 D) more than one correct response E) no correct response {Ans: C}The description "two substances present, two phases present" is correct for what type of mixture? {Ans: Heterogeneous mixture}When a substance undergoes a chemical change it is always true that: -It liquifies -It changes from a solid to a gas -It is converted to a new kind of matter with a different composition -The temperature of the substance increases {Ans: It is converted to a new kind of matter with a different composition}Two naturally occuring isotopes exist for the hypothetical element Dippium. 25.0 percent of dippium atoms have a relative mass of 17.0 amu and 75.0 percent have a relative mass of 21.3 amu. What is the atomic mass of dippium? A) 18.1 amu B) 19.1 amu C) 20.2 amu D) 38.3 amu {Ans: C}One substance present,