Chapter 1-Let's Review

If the density of nitrogen in air is 0.87 g/L, what mass (in kg) of nitrogen is contained in a room with dimensions of 4.0 m x 3.5 m x 2.4 m? a.29 kg b.39 kg c.2.6 10-2 kg d.2.9 104 kg e.26 kg

A. 29 kg

The SI unit of temperature is the ____. a. kelvin b. calorie c. Fahrenheit d. Ångstrom e. kilocalorie

A. Kelvin

The boiling point of liquid oxygen is 90.2 K. What is this temperature in celsius? a. -208.0 C b. -183.0 C c. 90.2 C d. 194.4 C e. 363.4 C

B. -183 C

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

B. 1.3

Which of the following volumes are equivalent to 75 mL? 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

B. 2 only

Round 0.00680483 to 3 significant figures. a.0.00 b.0.007 c.0.00680 d.0.006804 e.0.006805

C. 0.00680

The boiling point of ammonia is -33.3 C. What is this temperature in kelvin? a. -306.5 K b. -33.3 K c. 239.9 K d. 306.5 K e. 331.5 K

C. 239.9 K

Express 0.00720 in exponential notation. a.7.20 103 b.7.2 10-3 c.7.20 10-3 d.7.2 103 e.7.2000 10-3

C. 7.20 x 10^-3

What is the correct answer to the following expression? 7.4576 x 10^-2 + 4.11 x 10^-5 + 6 x 10^-4 = ? a.7. x 10-2 b.7.5 x 10-2 c.7.52 x 10-2 d.7.522 x 10-2 e.7.5217 x 10-2

C. 7.52 x 10^-2

The SI base unit of length is the ____. a. Newton b. liter c. meter d. cm^3 e. Ångstrom

C. Meter

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 c. 1.5 10-1 pm d. 1.5 104 pm e. 1.5 107 pm

D. 1.5 x 10^4

The volume of space occupied by a beryllium atom is 6.0 10-30 m3. What is this volume in units of 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

D. 6.0 x 10^-3

Which of the following is the smallest mass? a. 1.5 10^8 pg b. 1.5 10^6 ng c. 1.5 10^3g d. 1.5 10^-1 mg e. 1.5 10^-5 g

E. 1.5 x 10^-5