D 7 - CORRECT ANSWER: C 6

Chem 210 Final exam study guide Latest Update 2024- 2025 Version with Questions and Verified Correct Answers Guaranteed A+ . What is the mass of 0.500 mol of dichlorodifluoromethane, CF2CI2?

• 4.14e-3

B)60.5 g

• 121 g

D) 242 g - CORRECT ANSWER: B) 60.5 g

• What is the oxidation number of the chromium atom in K2Cr2O7?
• -2
• +2
• +6

D) +7 - CORRECT ANSWER: C) +6

• An element has two naturally occurring isotopes. One has an abundance of 37.40%

and an isotopic mass of 184.953 amu, and the other has an abundance of 62.60% and a mass of 186.956 amu. What is the atomic weight of the element?

• 185.7 amu
• 186.0 amu
• 186.2 amu

D) 187.0 amu - CORRECT ANSWER: C) 186.2 amu

A laboratory procedure requires 4.67 g of a liquid whose density is 1.034 g/mL. What volume of liquid should be used for this procedure?

• 4.83 mL
• 4.52 mL
• 0.221 mL

D) 5.70 mL - CORRECT ANSWER: B) 4.53 mL

A reaction is carried out at constant pressure; q=125kJ and w=-15kJ. what are values of ^V and ^H

a) E=110kJ and H=125kJ

B)E=125kJ and H=110kJ

• E=125kJ and H-140kJ

D) E=140 and H=125kJ - CORRECT ANSWER: A) 110kJ and 125

A student measured the diameter of a sphere and determined the average value. His measurements are 5.17 cm, 5.16 cm, 5.16 cm, and 5.17 cm. If the true diameter is 6.18 cm, what can be said about the student's results?

• it is accurate and precise

B)It is accurate but not precise

• it is precise but not accurate

D) it is neither - CORRECT ANSWER: C) it is precise but not accurate

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A triple bond is generally composed of

• three pi bonds

B)two pi bonds and one ohmaga bond

• one pi bond and two ohmaga bond

D) three ohmaga bonds - CORRECT ANSWER: B) two pi bonds and one ohmaga bond

Argon belongs to the ____group

• alkali metal

B)alkaline earth C)halogen

D) noble gas - CORRECT ANSWER: D) noble gas

Assign formal cahared to each atom in the resonance form for SOCl2 given below

• 0 for cl, 0 for S, 0 for O

B)0 for cl, +1 for S, -1 for O

• -1 for cl, +4 for S, -2 for O
• -1 for cl, -2 for S, -2 for O - CORRECT ANSWER: B)0 for cl, +1 for S, -1 for O

Calculate the work energy, w, gained or lost by the system when a gas expands from 15L to 35L against a constant external pressure of 1.5 atm.{1L*atm=101J}

• -5.3kJ

B)+3.0kJ

• -3.0kJ

D) +5.3 - CORRECT ANSWER: C) -3.0 kJ

consider a molecule with the following connections:

when a vaild electron dot structure is written how many double bonds will the molecule contain?

• 0
• 1
• 2

D) 4 - CORRECT ANSWER: C) 2

convert 0.003002 to standard scientific notoation A)3.002e-3 B)3002e-6

C)3.0023

D3002e6 - CORRECT ANSWER: A) 3.00e-3

Group 2A metals tend to be somewhat less reactive than alkali metals, and the order of their reacivity is

• Ba>Sr>Ca>mg>Be

B)Be>Mg>Ca>Sr>Ba

• Ca>Mg>Be>Ba>Sr

D) Sr>Ca>Mg>Be>Ba - CORRECT ANSWER: A) Ba>Sr>Ca>mg>Be

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