Question 1

A student measures the mass of a beaker and water as 29.62 g and the mass of the beaker alone as 28.3220 g. What is the mass of the water, reported to the correct number of significant figures?

Accepted Answer

1.298 g

Question 2

What is the correct reading of the liquid volume in the graduated cylinder shown, using the correct number of significant figures?

Accepted Answer

20.8 \ \mathrm{mL}

Question 3

A sample of metal is placed in a graduated cylinder containing water. The water level rises from 20.00 \ \mathrm{mL} to 21.00 \ \mathrm{mL}. If the mass of the metal is 5.00 \ \mathrm{g}, what is the density of the metal in $$\mathrm{g} \cdot \mathrm{cm}^{-3}$$?

Accepted Answer

5.00 \ \mathrm{g} / 1.00 \ \mathrm{cm}^3 = 5.00 \ \mathrm{g} \cdot \mathrm{cm}^{-3}

Question 4

Which particulate diagram best represents a pure compound?

Accepted Answer

A box with only pairs of different colored spheres bonded together.

Question 5

Which particulate diagram best represents a homogeneous mixture (solution)?

Accepted Answer

A box with randomly distributed single spheres of two different colors.

Question 6

Which of the following is the correct nuclear symbol for an isotope of bromine with 46 neutrons?

Accepted Answer

(C) \ ^{80}_{35}Br \

Question 7

Which of the following compounds contains a Group 14 element?

Accepted Answer

$$CCl_4$$

Question 8

Which Bohr model diagram correctly represents an atom with electrons in the n=1 and n=2 energy levels?

Accepted Answer

A nucleus with two concentric circles labeled n=1 and n=2.

Question 9

Which orbital diagram represents a filled s orbital?

Accepted Answer

A box with one up arrow and one down arrow.

Question 10

Which of the following best describes the classification of the sample represented by a box containing only one type of atom?

Accepted Answer

Element

Question 11

A student observes a box containing both single atoms and pairs of atoms of two different types. What is the best classification for this sample?

Accepted Answer

Mixture

General Chemistry Foundational Concepts: Measurement, Density, and Classification

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