Question 1

A graduated cylinder contains a liquid as shown in the image. What is the correct reading of the liquid volume, reported to the correct number of significant figures?

Accepted Answer

$$20.8\ \mathrm{mL}$$

Question 2

Given the following data: mass of beaker and water = $$29.62\ \mathrm{g}$$, mass of beaker = $$28.3220\ \mathrm{g}$$, what is the mass of the water, reported to the correct number of significant figures?

Accepted Answer

$$1.298\ \mathrm{g}$$

Question 3

Which particulate diagram best represents a pure compound?

Accepted Answer

A box with only identical pairs of two different atoms bonded together.

Question 4

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

Accepted Answer

A box with two types of particles, evenly distributed and not bonded.

Question 5

A sample of metal is placed in a graduated cylinder containing water. The water level rises from $$20.0\ \mathrm{mL} to$$ $$21.0\ \mathrm{mL}. If $$the mass of the metal is $$5.00\ \mathrm{g}$$, what is the density of the metal?

Accepted Answer

$$5.0\ \mathrm{g}\cdot\mathrm{cm}^{-3}$$

Question 6

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

Accepted Answer

$$^{81}_{36}\mathrm{Br}$$

Question 7

Which of the following compounds contains a Group 14 element?

Accepted Answer

$$\mathrm{CCl}_4$$

Question 8

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

Accepted Answer

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

Question 9

Which orbital diagram correctly represents a filled $$2s$$ orbital?

Accepted Answer

A box with one up arrow and one down arrow.

Question 10

Which of the following best describes the periodic table block that includes the alkali and alkaline earth metals?

Accepted Answer

The leftmost two columns of the periodic table.

General Chemistry Foundational Concepts: Measurement, Density, and Classification

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