Question 1

Which of the following best describes the difference between qualitative and quantitative measurements in the scientific method?

Accepted Answer

Qualitative measurements involve descriptions without numbers, while quantitative measurements involve numbers and units.

Question 2

Convert $$4.56 	imes 10^3$ to standard decimal notation.

Accepted Answer

$$4560$$

Question 3

Which of the following is the correct number of significant figures in the measurement $$0.004520$$?

Accepted Answer

4

Question 4

A student measures the mass of a sample as $$12.30 g $$and the volume as $$4.0 mL. $$What is the density, reported with the correct number of significant figures?

Accepted Answer

$$3.1 g/mL$$

Question 5

Which of the following is NOT a base SI unit?

Accepted Answer

gram

Question 6

How many significant figures are in the result of $$6.02 	imes 10$$^{23}$$ 	imes 2.0$$?

Accepted Answer

2

Question 7

Which of the following statements about Dalton's atomic theory is FALSE?

Accepted Answer

Atoms can be divided into protons, neutrons, and electrons.

Question 8

Which experiment provided evidence for the existence of the nucleus in the atom?

Accepted Answer

Rutherford gold foil experiment

Question 9

An atom has 17 protons, 18 neutrons, and 17 electrons. What is its mass number?

Accepted Answer

35

Question 10

Which of the following correctly describes an isotope?

Accepted Answer

Atoms with the same number of protons but different numbers of neutrons.

Question 11

How many moles are in $$18.0$$ grams of water ($$H_2O$$)? (Molar mass of $$H_2O = 18.0 g/$$mol)

Accepted Answer

$$1.0$$ mol

Question 12

Which of the following elements is a nonmetal?

Accepted Answer

Chlorine

Question 13

What is the correct formula for the compound formed between magnesium and chlorine?

Accepted Answer

$$MgCl_2$$

Question 14

Which of the following is a covalent compound?

Accepted Answer

$$CO_2$$

Question 15

How many electrons are in a $$^{35}Cl^-$$ ion?

Accepted Answer

18

Question 16

Which of the following best describes a mixture?

Accepted Answer

A combination of two or more substances in which each retains its own identity.

Question 17

What is the charge on the ion formed by aluminum?

Accepted Answer

$$+3$$

Question 18

Which of the following is the correct name for $$Fe_2O_3$$?

Accepted Answer

Iron(III) oxide

Question 19

A sample contains $$3.01 	imes 10$$^{23}$$ molecules of CO_2$. How many moles of CO_2$ are present?

Accepted Answer

$$0.50$$ mol

Question 20

Which of the following statements about ionic and covalent bonds is correct?

Accepted Answer

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

General Chemistry Exam 1 Study Guide: Chapters 1 & 2

Study Guide - Practice Questions

Study Guide - Flashcards