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Chapter 2: Q64P (page 83)

Are molecules present in a sample of BaF2? Explain.

Short Answer

Expert verified

There are no molecules present in a sample of BaF2 because it is an ionic compound.

Step by step solution

01

Define ionic compounds

An ionic compound is a chemical compound made up of ions kept together by electrostatic forces known as ionic bonding. The net charge of ionic compounds is neutral (zero), although it contains both positively and negatively charged ions known as cations and anions.

02

Find the type of compound

The sample of BaF2containsbarium cations (metals) and fluoride anions.Because cations and anions create a strong electrostatic interaction between them to form ionic bonds. Therefore, the sample of BaF2 has no molecules.

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Most popular questions from this chapter

Dolomite is a carbonate of magnesium and calcium. Analysisshows that 7.81 g of dolomite contains 1.70 g of Ca. Calculate themass percent of Ca in dolomite. On the basis of the mass percentof Ca, and neglecting all other factors, which is the richer sourceof Ca, dolomite or fluorite (see Problem 2.20)?

The mass percent of sulfur in a sample of coal is a key factor in the environmental impact of the coal because the sulfur combines with oxygen when the coal is burned and the oxide can then be incorporated into acid rain. Which of the following coals would have the smallest environmental impact?

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Coal A

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11.3

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Coal C

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Define atomic number and mass number which can vary without changing the identity of the element?

Fill in the blanks:

(a) The symbol and atomic number of the heaviest alkaline earthmetal are ________ and ________.

(b) The symbol and atomic number of the lightest metalloidin Group 4A(14)are ________ and ________.

(c) Group 1B(11) consists of the coinage metals.The symbol and atomic mass of the coinage metal whose atoms have the fewest electrons are________ and ________.

(d) The symbol and atomic mass of the halogen in Period 4 are ________ and ________.

The tap water found in many areas of the United States leaves white deposits when it evaporates. Is this tap water a mixture or a compound? Explain.
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