Exam 1 Review KEY
Supplemental Instruction
Iowa State University / Leader: / Allison
Course: / Chem 163
Instructor: / Dr. Appy
Date: / 9/16/14
  1. Define Matter:Anything that has mass and volume
  2. Matter can exist as which of the following?
  3. As a homogenous mixture of pure substances
  4. A pure substance
  5. As a heterogeneous mixture of pure substances
  6. As all of the above
  7. To be a compound, a substance must
  8. Be made from more than one type of element
  9. Not be a mixture
  10. Be homogenous
  11. Be all of the above
  12. An element can also be a compound.
  13. True
  14. False
  15. When a pure substance melts, it
  16. Changes state
  17. Changes from a liquid to solid
  18. Sublimes
  19. Undergoes a chemical change
  20. Mud is an example of what type of matter?
  21. Element
  22. Compound
  23. Homogenous mixture
  24. Heterogeneous mixture
  25. A KitKat bar melting is a(n) ______.
  26. Chemical change
  27. Physical change
  28. Unfortunate event
  29. None of the above
  30. In a chemical reaction,
  31. A physical change takes place
  32. Products are converted into reactants
  33. One or more substances are converted into different substances
  34. Elemental substances change into different elements
  1. Mickey and Minnie are measuring the height of liquid in a graduated cylinder. Mickey’s measurements are 12.4 mL, 12.1 mL and 11.5 mL. Minnie’s measurements are 12.0 mL, 12.1 mL, and 12.0 mL. If the actual measurement is 12.0 mL, which of the following statements is correct?
  2. Mickey’s measurements are more precise and more accurate.
  3. Minnie’s measurements are more precise and more accurate
  4. Mickey’s measurements are more precise, but Minnie’s are more accurate
  5. Minnie’s measurements are more precise, but Mickey’s are more accurate
  6. How many significant figures are in
  7. 0.0678 ----- 3 sigfigs
  8. 0.009050 ------4 sigfigs
  9. 10090.0 ------6 sigfigs
  10. 9.0 ------2 sigfigs
  11. Carry out the following operations. Express the answers with the appropriate number of significant figures
  12. (2.978 - 1.31) x 0.00899 = 0.0150
  13. 4.5678 + 0.034 – 0.9 = 3.7
  14. 7.9087 x 6.784 = 53.76
  15. Convert
  16. 76.0 F to C ----- 24.4 C
  17. 13.7 C to F ------56.7 F
  18. Which of the following subatomic particles has the least mass?
  19. Neutron
  20. Electron
  21. Proton
  22. Isotopes of an element have the same number of Protons but different number ofNeutrons
  1. Express each mass in grams, both in standard notation and scientific notation:
  2. 563 mg = 0.563 g
  3. 8.26 dg = 0.826 g
  4. 139 kg = 139000 or 1.39 x 10 ^ 5
  5. It takes 487.5 J to heat 25.0g of Copper from 25.0C to 75.0C. What is the specific heat in J/g C?

0.390 J/ g C

  1. What is the heat in Joules required to raise the temperature of 25.0g of Water from 0.0C to 100C? The specific heat of water = 4.18 J/g C

10, 500 J

  1. Gold has a Density of 19.30 g/mL. What is the volume (in mL) occupied by 1.20 lb of Gold? (1 lb = 454 g). Show all work and express answer with the correct number of significant figures.

28.2 mL

  1. 51.00 g of NaN2decomposes completely to give Na and N. If the resulting mass of N is 28.00 g, what is the mass of Na after the reaction?

23.00 g Na

  1. 51.00 g of NaN2decomposes to give 28.00 g of N. What is the percent composition of N in NaN2?

54.90% N

  1. True or False. Nonmetals tend to become cations?
  1. Write the correct charge for each subatomic particle
  2. Protons +
  3. Neutrons no charge
  4. Electrons -
  1. The red light from a helium-neon laser has a wavelength of 633 nm. What is the energy of one photon?

3.14 x 10 ^ (-19) J

  1. Fill in the table.

Protons / Neutrons / Electrons / Net Charge
40K+ / 19 / 21 / 18 / +
19F / 9 / 10 / 9 / 0
40Ca / 20 / 20 / 20 / 0
31P / 15 / 16 / 15 / 0
  1. On the periodic table below, identify the location of alkaline earth metals, noble gases, transition metals and lanthanides:

1