Macomb Community College CHEM 1050 Chief_Proton_Toad11

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Macomb Community College CHEM 1050Final exam answers only 1. Which of the following is a property of both gases and liquids? B) indefinite shape The description “two substances present, two phase... s present” is correct for A) heterogeneous mixtures. An element is a substance which D) cannot be broken down into simpler substances by chemical means. A pure substance H is found to change upon heating into two new pure substances P and W. Both P and W may be decomposed by chemical means. From this we may conclude that D) H, P and W are all compounds The most abundant elements in the universe and the earth's crust are, respectively, D) hydrogen and oxygen. In which of the following sequences of elements do each of the elements have a twoletter chemical symbol? B) krypton, nickel, rubidium In which of the following sequences of elements do each of the elements have a one letter chemical symbol? B) fluorine, carbon, sulfur Which of the following pairings of chemical formulas and "molecular descriptions" is incorrect? D) SiO2 and "diatomic" In which of the following pairs of chemical formulas do both formulas represent compounds? D) N2O4 and NO2 [Show More]

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