Introductory Chemistry: A Foundation
8th Edition
ISBN: 9781285199030
Author: Steven S. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Textbook Question
Chapter 3.2, Problem 3.1SC
Exercise 3.1 Which of the following are physical properties, and which are chemical properties?
- Gallium metal melts in your hand.
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EXERCISE
1-3 Physical Properties and Changes
Identify each physical property and physical change mentioned in each of these
statements. Also identify the qualitative and the quantitative information given in each
statement.
(a) The blue chemical compound azulene melts at 99°C.
(b) The white crystals of table salt are cubic.
(c) A sample of lead has a mass of 0.123 g and melts at 327°C.
(d) Ethanol is a colorless liquid that vaporizes easily; it boils at 78°C and its
density is 0.789 g/mL.
easurements and Calculations: Dimensional Analysis
cermining a property such as density requires scientific measurements a
culations. The result of a measurement, such as 6.544 g or 8.30 mL, usua
Exercise -1- (6pts)
Chemical Composition of Sand
Sand, which is used in making glass, is formed mainly of the compound silica (a compound formed between
silicon Si and oxygen O). Silicon is used also in computer chips. When mixed with steel, it makes the alloys
harder and resistant to corrosion while oxygen is used in chemical industry and medical treatment.
The documents below show some information about silicon and oxygen atoms.
nb of protons
nb of neutrons
Nuclear charge
Silicon atom
14
15
Oxygen atom
8+
Document 1
Document 2
1-Referring to document 1:
1.1- Indicate the number of electrons of silicon atom.
1.2- Determine the atomic number of silicon atom.
1.3- Calculate its mass number.
1.4- Write the atomic representation of silicon atom (Si).
2-Referring to document 2:
.1- Show that
atom
number Z of oxygen atom is 8.
2.2- Write its electronic configuration .
2.3- Identify its valence shell and valence electrons.
2.4- Write its Lewis dot symbol and deduce its valency.
3- Referring…
Practice Exercise
Consider the following description for the element iron, Fe
Ph
Iron is a silver-white malleable ductile magnetic heavy metallic element that readily
rusts in moist air to give a hydrated iron oxide. ron reacts with excess of the halogens
F2, Cl, and Br, to form ferric halides.
Identify the physical and chemical properties of iron in the description above.
Chapter 3 Solutions
Introductory Chemistry: A Foundation
Ch. 3.2 - Exercise 3.1 Which of the following are physical...Ch. 3.2 - Prob. 3.2SCCh. 3.4 - Exercise 3.3 Classify each of the following as a...Ch. 3.5 - The scanning tunneling microscope allows us to...Ch. 3 - When water boils, you can see bubbles rising to...Ch. 3 - If you place a glass rod over a burning candle,...Ch. 3 - The boiling of water is a physical change because...Ch. 3 - Is there a difference between a homogeneous...Ch. 3 - Sketch a magnified view (showing atoms and/or...Ch. 3 - Are all physical changes accompanied by chemical...
Ch. 3 - Why would a chemist find fault with the phrase...Ch. 3 - Are separations of mixtures physical or chemical...Ch. 3 - Explain the termselement, afoul, and compound....Ch. 3 - Mixtures can be classified as either homogeneous...Ch. 3 - Prob. 11ALQCh. 3 - Look at Table 2.8 in your text. How do the...Ch. 3 - Label of the following as an atomic element, a...Ch. 3 - Match each description below with the following...Ch. 3 - Prob. 1QAPCh. 3 - What is the chief factor that determines...Ch. 3 - Of the three stales of matter, and are not very...Ch. 3 - has a definite volume hut takes the shape of its...Ch. 3 - Compare and contrast the ease with which molecules...Ch. 3 - Matter in the __________ state has no shape and...Ch. 3 - What similarities are there between the solid and...Ch. 3 - A sample of matter that is “rigid” has...Ch. 3 - Consider three 10-g samples of water: one as ice,...Ch. 3 - ¡n a sample of a gaseous substance, more than 99%...Ch. 3 - Elemental bromine is a dense, dark-red,...Ch. 3 - Is the process represented below a physical or...Ch. 3 - From the information given above, indicate...Ch. 3 - Prob. 14QAPCh. 3 - Prob. 15QAPCh. 3 - Which of the following is/are examples of a...Ch. 3 - Classify each of the following as a physical or...Ch. 3 - Classify each of the following as aphysical or...Ch. 3 - Prob. 19QAPCh. 3 - What is acompound? What are compounds composed of?...Ch. 3 - Certain elements have special affinities for other...Ch. 3 - _________ can he broken down into the component...Ch. 3 - The composition of a given pure compound is always...Ch. 3 - Which of the following are considered compounds...Ch. 3 - If iron filings are placed with excess powdered...Ch. 3 - If the combination of iron filings and sulfur in...Ch. 3 - Prob. 27QAPCh. 3 - Prob. 28QAPCh. 3 - Classify the following asmixturesorpure...Ch. 3 - Classify the following asmixturesorpure...Ch. 3 - Classify the following mixtures...Ch. 3 - Read the “Chemistry in Focus” segmentConcrete—An...Ch. 3 - Prob. 33QAPCh. 3 - Describe how the process offiltrationcould be used...Ch. 3 - In a common laboratory experiment in general...Ch. 3 - During a filtration or distillation experiment, we...Ch. 3 - Prob. 37APCh. 3 - Classify each of the following as a(n) element,...Ch. 3 - 1f a piece of hard, white blackboard chalk is...Ch. 3 - During a very cold winter, the temperature may...Ch. 3 - Prob. 41APCh. 3 - True or false? Salad dressing (such as oil and...Ch. 3 - Prob. 43APCh. 3 - Which of (he following are true? P4 is considered...Ch. 3 - (For Exercises 4546) Solutions containing...Ch. 3 - (For Exercises 4546) Solutions containing...Ch. 3 - The processes of melting and evaporation involve...Ch. 3 - A(n) always has the same composition.Ch. 3 - Classify each of the following as...Ch. 3 - Classify the following mixtures as homogeneous or...Ch. 3 - Prob. 51APCh. 3 - Prob. 52APCh. 3 - Give three examples each ofheterogeneousmixtures...Ch. 3 - True or false? Mixtures always result in a...Ch. 3 - Choose an element or compound with which you are...Ch. 3 - Prob. 56APCh. 3 - Give an example of each of the following: a...Ch. 3 - Prob. 58APCh. 3 - Sketch the apparatus commonly used for simple...Ch. 3 - Prob. 60APCh. 3 - Which of the following best describes the...Ch. 3 - Prob. 62CPCh. 3 - Which of the following describes a chemical...Ch. 3 - Prob. 64CPCh. 3 - Prob. 1CRCh. 3 - Prob. 2CRCh. 3 - You have learned the basic way in which scientists...Ch. 3 - Many college students would not choose to take a...Ch. 3 - Prob. 5CRCh. 3 - Prob. 6CRCh. 3 - Prob. 7CRCh. 3 - Prob. 8CRCh. 3 - Prob. 9CRCh. 3 - What ismatter? What is matter composed of? What...Ch. 3 - Prob. 11CRCh. 3 - Prob. 12CRCh. 3 - Prob. 13CRCh. 3 - Prob. 14CRCh. 3 - Prob. 15CRCh. 3 - Prob. 16CRCh. 3 - Prob. 17CRCh. 3 - a. Given that 1100. mL of ethyl alcohol weighs...Ch. 3 - Which of the following represent physical...
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