CHM 1020 - Final Exam Study Guide questions and answers

CHM 1020 - Final Exam Study Guide questions and answers The quantity 0. g expressed in scientific notation is ___________. - 6.4 x 10^-6 A substance that can be broken down into 2 or more simpler substances only by chemical methods is called a(n) - compound Which is not a mixture? - sodium chloride which substance is an element? - N2 The majority of new smartphones being released have displays that are at least 5.00 inches in size. What is this size in centimeters? (There are 2.54 cm in one inch.) - 12.7 cm which one of the following is a subatomic particle located in the center of the atom and has a positive charge? - Proton What are the three pillars of sustainability? - Environmental, social, economic Oxidation and reduction of atoms involves a change in the number of __________ in the atom. - Electrons One of the lightest smartphones on the market today weighs 113 g. To protect your phone, you may want to use a screen protector, which weighs 27.2 g, and a heavy duty case which weighs 114 g. What is the total weight of the phone, screen protector, and case? - 254 g 2.3 x 10^6 meters is the same _________________ meters. - 2,300,000 How many protons and neutrons, respectively, are in an atom of chlorine (mass #35)? - Protons: 17 Neutrons: 18 For the Ionic compound NaCl, what is the charge on the sodium ion? - + 1 Which of the following is a diatomic molecule: Hydrogen (H2), Aluminum (Al), Sulfur(S8) or Carbon (C)? - Hydrogen (H2) What is the correct answer to the following problem (w. the correct # of significant figures)(3.2 / 0.123) + 45.7 = ? - 72 One of the 3 pillars of sustainability, resulting in a better quality of life for all - Social The Atomic # of fluorine - 9 Anything that occupies space and has mass - matter Tea would be an example of a - Homogeneous Mixture A molecule composed of a metal atom and a nonmetal atom - Ionic The quantity 8.7 x10^5 g expressed in a standard decimal notation. - 870,000 g On a Periodic Table, the column of elements with similar properties are - groups The most numerous of the elements are the - metals Which is not a pure substance? - air Which one of the following is a subatomic particle located in the center of the atom and has no charge? - neutrons A computer chip was weighed and found to have a mass of 23.3040 g. How many significant figures do