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Multiple Choice: Choose the correct answer for each question or statement. Note that only one option may be selected.
Please note that pressing enter/return on your keyboard at anytime will submit your quiz, so please be careful!
1) If matter is uniform throughout, cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is called a (an) __________.
heterogeneous mixture element homogeneous mixture compound mixture of elements
2) A separation process that depends on differing abilities of substances to form gases is called __________.
filtration solvation distillation chromatography all of the above are correct
3) The SI unit for mass is __________.
kilogram gram pound troy ounce none of the above are correct
4) The freezing point of water at 1 atm pressure is __________.
0 F 0 K 0 C -273 C -32 F
5) A temperature of 400 K is the same as __________ F.
261 286 88 103 127
6) 1 kilogram = __________ milligrams
1,000,000 1,000 10,000 1 × 10-6 none of the above are correct
7) "Absolute zero" refers to __________.
0 Kelvin 0 Fahrenheit 0 Celsius C + 9/5(F - 32) 273.15 C
8) An object will sink in liquid if the density of the object is greater than that of the liquid. The mass of a sphere is 9.83 g. If the volume of this sphere is less than __________cm3 then the sphere will sink in liquid mercury (density = 13.6g/cm3).
0.723 1.38 134 7.48 none of the above are correct
9) Which one of the following is a pure substance?
concrete wood salt water elemental copper milk
10) Which states of matter are significantly compressible?
gases only liquids only solids only liquids and gases solids and liquids
11) Of the following, only __________ is a chemical reaction.
melting of lead dissolving sugar in water tarnishing of silver crushing of stone dropping a penny into a glass of water
12) Of the objects below, __________ is the most dense.
an object with a volume of 2.5 L and a mass of 12.5 kg an object with a volume of 139 mL and a mass of 93 g an object with a volume of 0.00212 m3 and a mass of 4.22 x 104 mg an object with a volume of 3.91 x 10-24 nm3 and a mass of 7.93 x 10-1 ng an object with a volume of 13 dm3 and a mass of 1.29 x 103 g
13) Which of the following has the same number of significant figures as the number 1.00310?
100. 199.791 8.66 5.119 100
14) How many significant figures should be retained in the result of the following calculation?
12.00000 × 0.9893 + 13.00335 × 0.0107
2 3 4 5 6
15) Round the number 0.08535 to two significant figures.
0.09 0.086 0.0854 0.085 0.08535
