PRACTICE_MIDTERM-1

PRACTICE_MIDTERM-1 - Chemistry 133/134 Practice_Midterm 1...

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Chemistry 133/134/ Practice_Midterm 1. In 10 words or less, define each of the following: Significant figure, physical/chemical properties/change, protons/neutrons/electrons, anions/cations, isotopoes, mole, theoretical yield, limiting reactant, solution, compounds, ions, molecules 2. The density of gold is 19.3 g/cm 3 . What is the density of gold in lb/ft 3 ? (Ans 1.20 x 10 3 ) 3. The density of zinc is 455 lb/ft 3 . Calculate the mass (g) of 9.00 cm 3 of zinc. ( Ans 65.6 g) (1 lb =454g, 1 in =2.54 cm, 1ft = 12 in) (Ans 1.20 x 10 3 ) 4. Convert the following: 1.22 x 10 -12 km = nm (Ans 1.22) 1.51x 10 7 nm 3 = mm 3 (Ans 1.51 x 10 -11 ) 2.7 mm/ μ s = km/h (Ans 1.0) 5. Perform the following calculation to the correct number of significant figure and unit. 0.014371 m + 0.320 m) x (1.04 m + 0.3 m) (Ans 0.45 m 2 ) 12.64 cm – 48 mm – 0.246 m (answer in cm ) (Ans 32.4 cm) 6. Give the name of the following compounds. Compound Name Co 2 S 3 NH 4 Fe(SO 4 ) 2 FeCl 2 Al 2 O 3 H 2 SO 4 Ba(OH) 2 P 2 O 4 HCl (aq) Ca 3 N 2 HNO 2
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7. Complete the following table: Symbol Atomic number Number of protons Number of neutrons Number of electrons Net Charge 152 Eu 81 123 +1 Ni 30 +2 33 42 -3 40 Ca 2+ 8. Give the formula of the following compounds. Name
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PRACTICE_MIDTERM-1 - Chemistry 133/134 Practice_Midterm 1...

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