CHM 130, CHANDLER GILBERT COMMUNITY COLLEGE, FINAL EXAM REVIEW QUESTIONS WITH GUARANTEED CORRECT ANSWERS| GRADED A+

How many significant digits are in the volume measurement 0.010 liter? a.1 b.2 c.3 d.4 of the above - correct answers 2 Add 7.77 g to 11.666 g and round off the answer . a . 19.09 b . 19.49 c . 19.436 g d. 19.43 g e . 19.44 g - correct answers 19.44 g Express the exponential number 6.26 x 103 as an ordinary number. a. 0.006 26 b. 6,260 c. 0.000 0626 d. 0.000 626 e. 62,600 - correct answers 6,260 Which of the following unit factors is derived from the relationship of days and years? a. 1 year/1 day b. 365 years/365 days c. 1 year/365 days d. 1 day/365 years e. 365 years/1 day - correct answers 1 year/365 days If a patient is injected with 0.500 liter of IV liquid, what is the volume in quarts? (Given: 1 quart = 0.946 liters) a. 1.89 quarts b. 0.529 quarts c. 0.500 quarts d. 0.473 quarts e. 0.946 quarts - correct answers 0.529 quarts A penny minted after 1982 is composed of copper and zinc. If a penny has a mass of 2.507 g and is 97.5% zinc, what is the mass of zinc in the coin? a. 2.38 g b. 0.244 g c. 0.627 g d. 2.44 g e. 0.0627 g - correct answers 2.44 g What physical quantity is expressed by the metric unit kilogram? a. length b. mass c. volume d. density e. none of the above - correct answers mass According to the metric system, 1 L = 1 x 102 _____. a. cL b. dL c. kL d. mL e. none of the above - correct answers cL Osmium is the most dense element (22.5 g/cm3). What is the mass of 10.0 cm3 of the metal? a. 22.5 g b. 2.25 g c. 444 g d. 225 g e. 0.444 g - correct answers 225 g Liquid nitrogen boils at -196 ø C. What is the boiling point on the Kelvin scale? a. -77 K b. 77 K c. -469 K d. 196 K e. -196 K - correct answers 77 K Sodium chloride, potassium bromide, and many other salts are found dissolved in seawater. Classify seawater as one of the following. a. compound b. element c. heterogeneous mixture d. homogeneous mixture e. none of the above - correct answers Homogeneous mixture Which of the following names of elements corresponds to the symbol Fe? a. fluorine b. fermium c. iron d. manganese e. none of the above - correct answers iron Which of the following elements is an example of a semimetal? a. Ar b. As c. Am d. Ac e. Al - correct answers As Dynamite is made from TNT and cellulose paper. If the formula is C7H5(NO2)3, what is the number of atoms in the formula of the explosive? a. 21 b. 18 c. 45 d. 15 e. 4 - correct answers 21 Which of the following is an example of a chemical property? a. reactivity b. malleability c. specific gravity d. heat conductivity e. solubility - correct answers reactivity Which physical state demonstrates restricted movement of particles? a. solid state b. liquid state c. gaseous state d. all of the above e. none of the above - correct answers Liquid state What is the term for the value which indicates the total number of protons and neutrons in an atom of a given element? a. atomic notation b. atomic number c. atomic mass d. mass number e. none of the above - correct answers mass number Using atomic notation, indicate the isotope having 25 p+, 30 nø , and 25 e-. a. 55Zn 30 b. 30Zn 25 c. 55Mn 25 d. 55Mn 30 e. 30Mn 25 - correct answers 55Mn 25 Element Z has two natural isotopes: Z-79 (78.918 amu) and Z-81 (80.916 amu). Calculate the atomic mass of element Z given the abundance of Z-79 is 50.69%. a. 120.92 amu b. 79.90 amu c. 80.00 amu d. 119.93 amu e. 79.93 amu - correct answers 79.90 amu Which of the following energy-level changes for an electron is most energetic? a. 5 → 2 b. 3 → 2