Chapter 1 Math Let s Review The Tools of Quantitative Chemistry MULTIPLE CHOICE 1 The SI base unit of length is the 2 The SI unit of temperature is the 3 The boiling point of liquid oxygen is 90 2 K What is this temperature in celsius 4 The boiling point of ammonia is 33 3 C What is this temperature in kelvin 5 Which of the following is the smallest mass a Newton liter b c meter d cm3 e ngstrom ANS C a kelvin b calorie c fahrenheit d ngstrom e kilocalorie ANS A ANS D a 208 0 C b 183 0 C c 90 2 C d 194 4 C e 363 4 C ANS B a 306 5 K b 33 3 K c 239 9 K d 306 5 K e 331 5 K ANS C a 1 5 108 pg b 1 5 106 ng c 1 5 103 g d 1 5 10 1 mg e 1 5 10 5 g ANS E 6 Light with a wavelength of 1 5 10 8 m is in the x ray region of the electromagnetic spectrum What is the wavelength of this light in picometers a 1 5 10 80 pm b 1 5 10 20 pm 1 7 Which of the following volumes are equivalent to 75 mL 8 Express 0 00720 in exponential notation c 1 5 10 1 pm d 1 5 104 pm e 1 5 107 pm ANS D 1 0 75 cm3 2 7 5 10 2 L 3 0 0075 L a 1 only b 2 only c 3 only d 1 and 2 e 1 2 and 3 ANS B a 7 20 103 b 7 2 10 3 c 7 20 10 3 d 7 2 103 e 7 2000 10 3 ANS C nm3 a 6 0 10 57 nm b 6 0 10 21 nm c 6 0 10 12 nm d 6 0 10 3 nm e 6 0 106 nm ANS D a 0 00 b 0 007 c 0 00680 d 0 006804 e 0 006805 ANS C 9 The volume of space occupied by a beryllium atom is 6 0 10 30 m3 What is this volume in units of 10 Round 0 00680483 to 3 significant figures 11 What is the correct answer to the following expression 205 18 197 3 6 226 Carry out the subtraction operation first a 1 b 1 3 c 1 27 d 1 266 e 1 2657 ANS B 2 12 What is the correct answer to the following expression 7 4576 10 2 4 11 10 5 6 10 4 a 7 10 2 b 7 5 10 2 c 7 52 10 2 d 7 522 10 2 e 7 5217 10 2 ANS C dimensions of 4 0 m 3 5 m 2 4 m a 29 kg b 39 kg c 2 6 10 2 kg d 2 9 104 kg e 26 kg ANS A 13 If the density of nitrogen in air is 0 87 g L what mass in kg of nitrogen is contained in a room with 3