Chapter 1 Multiple choice questions

. Which one of the following is an algebraic phrase?

Enthalpy = 5000

Entropy = 5 J K^-1 mol^-1

209

23 cm

. Rewrite wavelength = 0.000 000 237m using a standard factor.

237 Gm

237 μm

2.37 cm

237 nm

. Rewrite an energy of 0.000 000 000 028 563J in scientific notation.

2.8563 x 10^-11J

2.8653 x 10^-10J

2.8653 x 10^-12J

0.28653 x 10^-10J

. Rewrite a volume of 50918734 m³ in scientific notation.

5.0918734 x 10⁸ m³

5.0918734 x 10⁷ m³

5.0918734 x 10^-7 m³

5.0918734 x 10⁶ m³

. Write the length 0.009 046 732 m to 3 significant figures.

0.009 m

0.00904 m

0.00905 m

0.010 m

. You are calculating the energy (E) of a photon, using the equation E = hv, where h = 6.626 x 10^-34 Js and v = 7.4 x 10¹⁴ s^-1.
To how many significant figures should you cite your answer?

2

3

4

20

. Calculate the pressure (in Pa) exerted on an area of 0.5 m² by a force of 746 N, using the equation: pressure = Force ÷ Area.
(Cite the answer to the correct number of significant figures.)

1500 Pa

2000 Pa

1490 Pa

1000 Pa

. The distance between two points is given as 0.063 m.
To how many decimal places is this value expressed?

2

3

4

6

. Calculate the volume of liquid in a beaker given that volume = 0.471 cm³ + 83.6 cm³ + 5.29 cm³.
(Cite your answer to the correct number of decimal places.)

89.4 cm³

89.361 cm³

89.2 cm³

89.3 cm³

. Calculate the energy of a reaction using the following equation: energy = 23.0 kJ + 0.563 J - 10.0 J.
(Cite the answer to the correct number of decimal places.)

22990 J

34 J

22991 J

22990.6 J

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