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Alexandra [31]
3 years ago
7

Make a circle graph for each set of data. Top 5 Most Linked-To Sites on the World Wide Web Site Hits (millions) America Online (

www.aol.com) 93.0 Microsoft (www.msn.com) 83.8 Yahoo! (www.yahoo.com) 80.2 Terra Lycos (www.lycos.com) 40.3 About (www.about.com) 36.6 Source: Scholastic Kid’s Almanac, 2001 a. A circle graph. America Online is about 25 percent; Microsoft, 25 percent; Yahoo 23 percent; Terra Lycos, 15 percent; About, 10 percent. c. A circle graph. America Online is about 27 percent; Microsoft, 27 percent; Yahoo 22 percent; Terra Lycos, 12 percent; About, 10 percent. b. A circle graph. America Online is about 12 percent; Microsoft, 10 percent; Yahoo 27 percent; Terra Lycos, 17 percent; About, 23 percent. d. A circle graph. America Online is about 12 percent; Microsoft, 10 percent; Yahoo 25 percent; Terra Lycos, 25 percent; About, 20 percent. Please select the best answer from the choices provided A B C D
Chemistry
1 answer:
strojnjashka [21]3 years ago
7 0

Answer:

it is a

Explanation:

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A 1.67-g sample of solid silver reacted in excess chlorine gas to give a2.21-g sample of pure solid Agcl.The heat given off in t
kotegsom [21]

<u>Given:</u>

Mass of Ag = 1.67 g

Mass of Cl = 2.21 g

Heat evolved = 1.96 kJ

<u>To determine:</u>

The enthalpy of formation of AgCl(s)

<u>Explanation:</u>

The reaction is:

2Ag(s) + Cl2(g) → 2AgCl(s)

Calculate the moles of Ag and Cl from the given masses

Atomic mass of Ag = 108 g/mol

# moles of Ag = 1.67/108 = 0.0155 moles

Atomic mass of Cl = 35 g/mol

# moles of Cl = 2.21/35 = 0.0631 moles

Since moles of Ag << moles of Cl, silver is the limiting reagent.

Based on reaction stoichiometry: # moles of AgCl formed = 0.0155 moles

Enthalpy of formation of AgCl = 1.96 kJ/0.0155 moles = 126.5 kJ/mol

Ans: Formation enthalpy = 126.5 kJ/mol


6 0
3 years ago
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The substances in a chemical reaction that are combined or separated to form new substances are the _______.
madam [21]

<span>Good Morning!
 
</span><span>reactants
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Substances that make up a chemical reaction, in order to be combined or separated, are called reagents. These reagents can be of the most varied types and origins. The result of this reaction is called a "product."
 
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Which way can heat never flow?
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Which way can heat never flow?

The wrong answer is a,c,d

The correct answer is b. Cold to Hot
7 0
3 years ago
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For a reversible reaction, what would a large equilibrium constant indicate?
siniylev [52]

(D) At equilibrium, the concentration of the products will be much higher than the concentration of the reactants.

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You are given 24.3 grams of Mg and combine it with 32.1 grams of Sulfur, what is the mass of MgS? *
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Answer:

ExplanatioFirst let us compute for the molar mass of Mg(OH)2.

molar mass = 24.3 + 2 (16) + 2(1.0)

molar mass = 58.3 g/mol

 

So the mass is then:

mass = 3.2 mol * (58.3 g/mol)

mass = 186.56 gramsn:

5 0
2 years ago
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