Q: Which of the following is a correct example of a factor-label (dimensional analysis) setup to convert 250 mL to liters?

$$250\ \mathrm{mL} \times \frac{1\ \mathrm{L}}{1000\ \mathrm{mL}}$$

Question 1

Which of the following statements correctly describes the difference between density and specific gravity?

Accepted Answer

Specific gravity compares the density of a substance to the density of water, while density is the mass per unit volume.

Question 2

A sample of ethanol has a mass of 46.0 g and a volume of 58.0 mL. What is its density in $$\mathrm{g/mL}$$?

Accepted Answer

$$0.793\ \mathrm{g/mL}$$

Question 3

Which of the following is the correct scientific notation for the number 0.000345?

Accepted Answer

$$3.45 	imes 10$$^{-4}$$

Question 4

Convert a temperature of $$25.0\ ^\circ\mathrm{C} to $$Kelvin.

Accepted Answer

$$298.15\ \mathrm{K}$$

Question 5

Which of the following elements has the electron configuration $$1s^2$$\ $$2s^2$$\ $$2p^6$$\ $$3s^2$$\ $$3p^4$$?

Accepted Answer

Sulfur (S)

Question 6

How many valence electrons does an atom of magnesium (Mg) have?

Accepted Answer

2

Question 7

Which of the following is the correct Lewis dot symbol for nitrogen (N)?

Accepted Answer

A symbol N with 5 dots around it

Question 8

Which of the following hydrocarbons is an alkyne?

Accepted Answer

C$$_2H$_2$$

Question 9

What is the molecular formula for cyclopentane?

Accepted Answer

C$$_5H$_{10}$$

Question 10

Which of the following statements about isotopes is correct?

Accepted Answer

Isotopes of an element have the same number of protons but different numbers of neutrons.

Question 11

Which orbital type is spherical in shape?

Accepted Answer

$$s$$ orbital

Question 12

How many bonds does a typical oxygen atom form in a covalent compound?

Accepted Answer

2

Question 13

Which of the following is a correct condensed structural formula for butane?

Accepted Answer

CH$$_3CH$_2CH$_2CH$_3$$

Question 14

A patient’s body temperature is measured at $$102.2\ ^\circ\mathrm{F}. $$What is this temperature in $$^\circ\mathrm{C}$$? (Use $$^\circ\mathrm{C} = ( ^\circ\mathrm{F} - 32 ) 	imes \frac{5}{9})$$

Accepted Answer

$$39.0\ ^\circ\mathrm{C}$$

Question 15

Which of the following is a correct example of a factor-label (dimensional analysis) setup to convert 250 mL to liters?

Accepted Answer

$$250\ \mathrm{mL} 	imes \frac{1\ \mathrm{L}}{1000\ \mathrm{mL}}$$

Question 16

Which of the following is a structural isomer of butane (C$$_4H$_{10}$$)?

Accepted Answer

2-methylpropane

Question 17

What is the bond angle around a carbon atom in ethene (C$$_2H$_4$$)?

Accepted Answer

$$120^\circ$$

Question 18

Which of the following is the correct name for the molecule with the formula CH$$_3CH$_2C$$\equiv CH?

Accepted Answer

1-butyne

Question 19

Which halogen side group is present in the molecule CH$$_3CH$_2Br$$?

Accepted Answer

Bromo

Question 20

Which family name is given to the elements in Group 17 of the periodic table?

Accepted Answer

Halogens

CHM 122 Exam I Study Guide: Matter, Atoms, and Introduction to Organic Chemistry

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