Question 1

Which of the following is NOT an example of an intensive property?

Accepted Answer

mass

Question 2

Which of the following materials has NOT been properly classified?

Accepted Answer

Steel is a compound.

Question 3

The density of Fe is $$7.86 \ \mathrm{g/mL}. $$Convert this to pounds per cubic foot. $$1 \ \mathrm{foot} = 30.48 \ \mathrm{cm}$$; $$1 \ \mathrm{lb} = 453.6 \ \mathrm{g}$$; $$1 \ \mathrm{mL} = 1 \ \mathrm{cm}^3$$

Accepted Answer

$$491$$

Question 4

A van travels $$4500$$ miles and gets $$13$$ miles/gallon of gasoline. If the average price of gasoline is $$1.27$$ per gallon, how many dollars did you spend on gasoline?

Accepted Answer

$$375$$

Question 5

How many grams of iron are present in $$1.00 \ \mathrm{kg} of $$steel? (Fe atomic mass: periodic table)

Accepted Answer

$$491 \ \mathrm{g}$$

Question 6

Which distance is greater? (Given: $$1 \ \mathrm{\AA} = 1 	imes 10$$^{-10}$$ \ \mathrm{m})$$

Accepted Answer

$$100 \ \mathrm{nm}$$

Question 7

Which is an INCORRECT statement regarding unit systems?

Accepted Answer

One centimeter is $$10^7$$ meters, and one nanosecond is $$10^7$$ picoseconds.

Question 8

Which element is INCORRECTLY matched with its symbol?

Accepted Answer

B / bismuth

Question 9

Denatured alcohol is ethyl alcohol to which various agents have been added to render it unfit for human consumption. A particular formula of denatured alcohol has $$91\%$$ ethyl alcohol by mass. How many grams of ethyl alcohol are present in $$500 \ \mathrm{g} of $$this alcohol?

Accepted Answer

$$455 \ \mathrm{g}$$

Question 10

Which of the following materials has NOT been properly classified?

Accepted Answer

Soil is a homogeneous mixture.

Question 11

Which volume is greater? (Given: $$1.00 \ \mathrm{in} = 2.54 \ \mathrm{cm})$$

Accepted Answer

$$1 \ \mathrm{cm}^3$$

Question 12

An iodine atom has a diameter of $$2.66 	imes 10$$^{-10}$$ \ \mathrm{m}. If $$iodine atoms are lined up so that they are just touching, how many of them would it take to have a line $$1.00$$ foot long? $$1 \ \mathrm{foot} = 30.48 \ \mathrm{cm} = 0.3048 \ \mathrm{m}$$

Accepted Answer

$$1.15 	imes 10^9$ atoms

Question 13

Identify the compound below which is an ionic compound.

Accepted Answer

Na$$_2CO$_3$$

Question 14

Identify the compound formula that is INCORRECT.

Accepted Answer

NH$$_4SO$_4$$ for ammonium sulfate

Question 15

The number of protons in a silicon atom is:

Accepted Answer

$$14$$

Question 16

Which of the following statements are TRUE?
1) Under normal conditions nitrogen exists as a diatomic molecule.
2) Ca(NO$$_3$$)$$_2 is an $$ionic solid.
3) An ionic solid always consists of cations and anions in equal numbers.

Accepted Answer

only 1 and 2

Question 17

Which of the following ion/name combinations is NOT CORRECT?

Accepted Answer

NH$$_4^+ / $$ammonia

Question 18

A doubly negative ion, symbolized by X$$^{2-}$$, forms a compound with a metal M, of the formula M$$_2X. $$What is the charge on the metal, M?

Accepted Answer

+1

Question 19

Which of the following is the empirical formula for the compound iron(II) carbonate?

Accepted Answer

FeCO$$_3$$

Question 20

Which of the following statements is incorrect?

Accepted Answer

The atomic number of an element is defined as the number of neutrons in the nucleus.

General Chemistry Fundamentals: Classification, Atomic Theory, Compounds, and Calculations

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