Q: How many milliliters are in two gallons of milk? (1.00 gal = 3.79 L, 1 L = 1000 mL)

$2 \times 3.79 \times 1000 = 7580$ mL

Q: A $7.0$ cm$^3$ block of Ti has a density of $4.4$ g/cm$^3$. A $4.0$ cm$^3$ block of Cu has a density of $8.96$ g/cm$^3$. Which block has a greater mass?

The copper block, because $4.0 \times 8.96 = 35.84$ g, which is greater than $7.0 \times 4.4 = 30.8$ g

Q: How many Li atoms are there in $0.524$ mol of lithium?

$0.524 \times 6.022 \times 10^{23} = 3.16 \times 10^{23}$ atoms

Q: How many moles of hydrogen atoms are in $8.011 \times 10^{23}$ H$_2$O molecules?

$8.011 \times 10^{23} \div 6.022 \times 10^{23} \times 2 = 2.66$ mol

Q: Which of the following is the correct formula for calculating density?

$\text{Density} = \frac{\text{Mass}}{\text{Volume}}$

Q: Which of the following is the correct molar mass for CH$_4$?

$12.01 + 4 \times 1.01 = 16.05$ g/mol

Question 1

Which of the following is an example of a chemical change?

Accepted Answer

Burning wood

Question 2

How many milliliters are in two gallons of milk? (1.00 gal = 3.79 L, 1 L = 1000 mL)

Accepted Answer

$2 	imes 3.79 	imes 1000 = 7580$ mL

Question 3

If the temperature is 98.6 $^\circ$C, what is the value in Kelvin?

Accepted Answer

$98.6 + 273.15 = 371.75$ K

Question 4

Methanol has a density of $0.7918$ g/mL. What is the mass of $18.0$ mL of methanol?

Accepted Answer

$0.7918 	imes 18.0 = 14.3$ g

Question 5

A $7.0$ cm$^3$ block of Ti has a density of $4.4$ g/cm$^3$. A $4.0$ cm$^3$ block of Cu has a density of $8.96$ g/cm$^3$. Which block has a greater mass?

Accepted Answer

The copper block, because $4.0 	imes 8.96 = 35.84$ g, which is greater than $7.0 	imes 4.4 = 30.8$ g

Question 6

Which subatomic particle has a negative charge and is found outside the nucleus?

Accepted Answer

Electron

Question 7

How many protons, neutrons, and electrons are in a neutral atom of $^{19}_{9}$F?

Accepted Answer

9 protons, 10 neutrons, 9 electrons

Question 8

What is the molar mass of phosphorus (P)?

Accepted Answer

$30.97$ g/mol

Question 9

How many Li atoms are there in $0.524$ mol of lithium?

Accepted Answer

$0.524 	imes 6.022 	imes 10^{23} = 3.16 	imes 10^{23}$ atoms

Question 10

How many moles of hydrogen atoms are in $8.011 	imes 10^{23}$ H$_2$O molecules?

Accepted Answer

$8.011 	imes 10^{23} \div 6.022 	imes 10^{23} 	imes 2 = 2.66$ mol

Question 11

Which of the following compounds is ionic?

Accepted Answer

NaCl

Question 12

Which atom is most likely to gain an electron to achieve a full outer shell?

Accepted Answer

Cl

Question 13

Which of the following is a mixture?

Accepted Answer

Air

Question 14

Which of the following best describes the law of conservation of mass?

Accepted Answer

Mass is neither created nor destroyed in a chemical reaction.

Question 15

Which of the following is a compound?

Accepted Answer

H$_2$O

Question 16

Which of the following statements about electrons is correct?

Accepted Answer

Electrons are found in orbitals outside the nucleus.

Question 17

Which of the following is the correct formula for calculating density?

Accepted Answer

$	ext{Density} = \frac{	ext{Mass}}{	ext{Volume}}$

Question 18

Which of the following is a physical property?

Accepted Answer

Melting point

Question 19

Which of the following is the correct molar mass for CH$_4$?

Accepted Answer

$12.01 + 4 	imes 1.01 = 16.05$ g/mol

Question 20

Which of the following best explains why water is a compound and not a mixture?

Accepted Answer

Water has a fixed ratio of hydrogen to oxygen atoms chemically bonded together.

General Chemistry I: Practice Exam 1 Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards