Q: A metal block displaces $$9.36\ \text{cm}^3 of $$water and has a mass of $$180.6\ \text{g}. $$What is the density of the metal, and which metal is it most likely to be?

Density $$= 11.5\ \text{g/cm}^3$$, lead

Q: Which ratio can be correctly derived from the molecular formula for water, $$\text{H}_2\text{O}$$?

$$2\ \text{mol H} : 1\ \text{mol H}_2\text{O}$$

Question 1

Which of the following best represents the correct reading of the liquid volume in the graduated cylinder shown in the image, using the correct number of significant figures?

Accepted Answer

$$63.6$$

Question 2

Based on the atmospheric carbon dioxide graph, what was the approximate CO$$_2$$ concentration in 1990?

Accepted Answer

$$355$$ ppm

Question 3

Calculate the atomic mass of gallium using the isotope data provided in the table. Use the correct number of significant figures.

Accepted Answer

$$69.72$$ 	ext{ amu}$

Question 4

A metal block displaces $$9.36\ 	ext{cm}^3 of $$water and has a mass of $$180.6\ 	ext{g}. $$What is the density of the metal, and which metal is it most likely to be?

Accepted Answer

Density $$= 11.5\ 	ext{g/cm}^3$$, lead

Question 5

Which of the following is a molecular element?

Accepted Answer

$$	ext{N}_2$$

Question 6

Which answer correctly reports the result of $$(85.3 - 21.489) \div 0.0059 to $$the correct number of significant figures?

Accepted Answer

$$1.1 	imes 10^4$

Question 7

A European car gets $$19\ 	ext{km/L}$$ gas mileage. What is this in miles per gallon? ($$1\ 	ext{mi} = 1.609\ 	ext{km}$$, $$1\ 	ext{gal} = 3.785\ 	ext{L})$$

Accepted Answer

$$45\ 	ext{mi/gal}$$

Question 8

Two samples of sodium chloride are decomposed. One produces $$6.98\ 	ext{g} Na $$and $$10.7\ 	ext{g} Cl. $$The second produces $$11.2\ 	ext{g} Na. $$What mass of Cl is produced in the second sample?

Accepted Answer

$$12.1\ 	ext{g}$$

Question 9

How many neutrons are present in $$^{94}_{40}	ext{Zr}$$?

Accepted Answer

$$54$$

Question 10

How many moles of phosphorus atoms are present in $$2$$ moles of $$	ext{Fe(H}_2	ext{PO}_4)_3$$?

Accepted Answer

$$6$$\ 	ext{moles}$

Question 11

What is the formula for the binary ionic compound formed between sodium and oxygen?

Accepted Answer

$$	ext{Na}_2	ext{O}$$

Question 12

Calculate the mass percent composition of nitrogen in $$	ext{N}_2	ext{O}.$$

Accepted Answer

$$63.65\%$$

Question 13

Which of the following statements is FALSE regarding atomic structure?

Accepted Answer

Some atoms have no protons.

Question 14

Which pair of elements is most similar in chemical properties?

Accepted Answer

Mg and Ba

Question 15

Which of the following will gain two electrons to form a $$2-$$ anion with the same number of electrons as the nearest noble gas?

Accepted Answer

O

Question 16

What is the correct name for $$	ext{SnCl}_4$$?

Accepted Answer

Tin(IV) chloride

Question 17

Calculate the formula mass of calcium nitrate, $$	ext{Ca(NO}_3)_2.$$

Accepted Answer

$$164.10$$ amu

Question 18

Which of the following is an alkali metal?

Accepted Answer

Cs

Question 19

A student weighs out $$10.0 g $$samples of aluminum, copper, gallium, gold, and silver. Which sample contains the highest number of atoms?

Accepted Answer

aluminum

Question 20

Which ratio can be correctly derived from the molecular formula for water, $$	ext{H}_2	ext{O}$$?

Accepted Answer

$$2\ 	ext{mol H} : 1\ 	ext{mol H}_2	ext{O}$$

Step-by-Step Guidance for CHEM 1020-01 Practice Exam 1 (Spring 2026)

Study Guide - Practice Questions

Study Guide - Flashcards