Question 1

Which of the following is the correct reading of the liquid level in the graduated cylinder shown in the image, using the correct number of significant figures?

Accepted Answer

64.40 mL

Question 2

Which of the following images represents a d orbital (l = 2)?

Accepted Answer

The fourth image (yellow, four-lobed shape in the xy-plane)

Question 3

Convert 3.42 × $$10^{-5} m to a $$value using an appropriate metric prefix (no exponents).

Accepted Answer

34.2 μm

Question 4

Express 128 ML (megaliters) in scientific notation using only the base unit L.

Accepted Answer

$$1.28 	imes 10^8$ L

Question 5

Which of the following numbers has five significant figures?

Accepted Answer

50,756

Question 6

A metal block displaces 9.36 cm$$^3 of $$water and has a mass of 180.6 g. What is the density of the metal, and which metal is it most likely to be?

Accepted Answer

Density = $$11.5\ \mathrm{g/cm^3$}$$, likely lead

Question 7

A European car has a gas mileage of 19 km/L. What is this value in mi/gal? (1 mi = 1.609 km, 1 gal = 3.785 L)

Accepted Answer

43 mi/gal

Question 8

Two samples of NaCl are decomposed. Sample 1: 6.98 g Na, 10.7 g Cl. Sample 2: 11.2 g Na, unknown g Cl. What is the unknown mass of Cl in sample 2?

Accepted Answer

12.1 g

Question 9

Which of the following reactions is inconsistent with Dalton’s Atomic Theory?

Accepted Answer

Ag + Pb $$\rightarrow Au + Li$$

Question 10

What is the wavelength (in nm) of a subatomic particle of mass $$7.21 	imes 10$$^{-31}$$ kg traveling at a speed of 1150 m/s? (h = 6.626$$ 	imes $$10^{-34} J$$·s)

Accepted Answer

632 nm

Question 11

Which of the following sets of quantum numbers is NOT allowed?

Accepted Answer

$$n = 0,\ l = 0,\ m_l = +1$$

Question 12

Which of the following sets of orbitals are degenerate?

Accepted Answer

Each of the seven 4f orbitals in principal level n = 4

Question 13

Which element in the third period has two 3s electrons and one 3p electron?

Accepted Answer

Aluminum (Al)

Question 14

A gold sample contains $$4.65 	imes 10$$^{24}$$ Au atoms. How many moles of gold does the sample contain? (N_A = 6.022$$ 	imes $$10^{23}$$ mol$$^{-1})$$

Accepted Answer

7.72 mol

Question 15

What will form when $$^{59}Ni $$loses two electrons?

Accepted Answer

$$^{59}Ni$^{2+}$$

Question 16

Calculate the energy of a photon with frequency $$15.77 	imes 10$$^{17}$$ Hz. (h = 6.626$$ 	imes $$10^{-34} J$$·s)

Accepted Answer

$$1.99 	imes 10$$^{-13}$$ J

Question 17

Which of the following statements about subatomic particles is FALSE?

Accepted Answer

Protons and neutrons have charges of the same magnitude but opposite signs.

Question 18

Which of the following is an alkali metal?

Accepted Answer

Cs

General Chemistry Practice Exam 1 – Step-by-Step Study Guidance

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