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

A snow cone is a heterogeneous mixture.

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

$1 \ \mathrm{nm}$

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

$2 	imes 10^6 \ \mathrm{m}^3$

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

$\mathrm{Na}_2\mathrm{CO}_3$

Question 14

Identify the compound formula that is INCORRECT.

Accepted Answer

$\mathrm{NH}_4\mathrm{SO}_4$ 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) $\mathrm{Ca(NO_3)_2}$ is an ionic solid.
3) An ionic solid always consists of cations and anions in equal numbers.

Accepted Answer

1 and 2

Question 17

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

Accepted Answer

$\mathrm{NH}_4^+$ / 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

$\mathrm{FeCO}_3$

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: Foundational Concepts, Classification, and Calculations

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