Chem Chap 1 Let's Review

The boiling point of liquid oxygen is 90.2 K. What is this temperature in celsius?

-183.0 C

Round 0.00680483 to 3 significant figures

0.00680

What is the correct answer to the following expression: (205.18 - 197.3) / 6.226? Carry out the subtraction operation first.

1.3

Light with a wavelength of 1.5 X 10-8 m is in the x-ray region of the electromagnetic spectrum. What is the wavelength of this light in picometers?

1.5 X 104 pm

Which of the following is the smallest mass? 1.5 108 pg 1.5 106 ng 1.5 103 g 1.5 10-1 mg 1.5 10-5 g

1.5 X 10^-5 g

The boiling point of ammonia is -33.3 C. What is this temperature in kelvin?

239.9 K

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?

29 kg

The volume of space occupied by a beryllium atom is 6.0 X 10-30 m3. What is this volume in units of nm3?

6.0 X 10^-3 nm

Express 0.00720 in exponential notation

7.20 X 10^-3

Which of the following volumes are equivalent to 75 mL? 0.75 cm3 7.5 X 10-2 L 0.0075 L

7.5 X 10^-2 L

The SI unit of temperature is the ____.

kelvin

The SI base unit of length is the ____.

meter