Introduction to Chemistry with Lab Test (CHEM 131 ) Guide 2023 Rated A+

Introduction to Chemistry with Lab Test (CHEM 131 ) Guide 2023 Rated A+. Given the sequence of temps below, which one represents the Fahrenheit boiling, room temp, and freezing points of water, in that order? A.0-75-100 B.212-75-32 C.0-25-100 D.0-298-373 E.none of the above Answer Key: B Question 7 of 12 0.0/ 4.0 Points `How should someone classify grape juice? A.mixture-homogeneous B.pure substance-compound C.mixture-heterogeneous D.pure substance-element E.none of the above Answer Key: A Question 8 of 12 0.0/ 4.0 Points `Gallium metal will melt in your hand. Which of the following is a true statement about this process? It represents a _______. A.physical change B.chemical property C.chemical change D.distillation E.none of the above Answer Key: A Question 9 of 12 0.0/ 4.0 Points `A solid that does not have a long range repeating order is called ________. A.fixed B.rigid C.amorphous D.crystalline E.none of the above Answer Key: C Question 10 of 12 0.0/ 4.0 Points `Please select the TRUE statement below. A.Mixtures may be composed of just one type of element. B.A pure substance may consist of two or more different compounds. C.A mixture cannot be homogeneous. D.Matter may be a pure substance or it may be a mixture. E.All of the above statements are true. Answer Key: D Part 4 of 4 - 0.0/ 10.0 Points Question 11 of 12 0.0/ 5.0 Points `IN YOUR OWN WORDS, who was John Dalton, and why is he so important to chemistry? What did he "discover" that is so central to our study of chemistry? Explain why it is important. I believe that John Dalton discovered Law of Partial Pressures, Law of Stoichiometry, and Atomic Theory, but he did not invent anything that I know of. Feedback: See section 1.4 Question 12 of 12 0.0/ 5.0 Points `Human remains are typically cremated at a temperature of about 870.0 degrees C. (1) What is this temperature in F? (2) What is this temperature in K? All work must be shown, labeled, and explained in detail to receive credit. Note that where applicable, superscripts (X2 ) can be written as X^2 and subscripts (X2) can be written as X_2 if it saves you time. Feedback: See section 3.10 Lesson 2 Quiz Return to Assessment List Part 1 of 3 - 12.0/ 20.0 Points Question 1 of 12 0.0/ 4.0 Points `If a nickel atom formed an ion, what charge would it have? A.1+ B.1- C.2- D.2+ E.it cannot be determined based on the information given Answer Key: E Feedback: See section 4.7. Transition metals can have various charges, though they will all be positive. Question 2 of 12 4.0/ 4.0 Points `The elements located in groups 3B through 2B are known as A.halogens B.transition metals C.alkaline earth metals D.noble gases E.none of the above Answer Key: B Feedback: See section 4.6 Question 3 of 12 4.0/ 4.0 Points `Which of these can be found in the nucleus? A.protons and electrons. B.only protons C.electrons and neutrons D.protons, neutrons, and electrons. E.protons and neutrons. Answer Key: E Feedback: See section 4.3 Question 4 of 12 4.0/ 4.0 Points `If iodine were to form an ion, what would its charge be? A.2- B.1+ C.1- D.2+ E.none of the above Answer Key: C Feedback: See the periodic table and section 4.7 Question 5 of 12 0.0/ 4.0 Points `Of the scientists listed below, which one did not contribute to developing the model of the atom? A.Rutherford B.Thomson C.Democritus D.Mendeleev E.Dalton Answer Key: D Feedback: See sections 4.2 through 4.5 Part 2 of 3 - 12.0/ 20.0 Points Question 6 of 12 4.0/ 4.0 Points `What would be the proper way to write the ion formula for acetate? A.C3H2O3 - B.C2H3O2 - C.C2H3O - D.C2H3O2 2- E.none of the above Answer Key: B Feedback: use naming rules and polyatomic ion list Question 7 of 12 0.0/ 4.0 Points `When naming Na3PO4 , it cannot be trisodium phosphate. Why? A.this compound should be called trisodium monophosphate. B.you cannot use a prefix for the first element of an ionic compound. C.you cannot use a prefix for the first element in a molecular compound. D.the sodium has a negative 3 charge. E.none of the above Answer Key: B Feedback: use naming mechanism