Midterm 3-CHEM 115 - Prof. Pavanello

Which one of the following molecules in nonpolar?

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1. Which one of the following molecules is nonpolar?

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Α, ΝΗ, B. OF C. CHCI D. HO E. BeCla

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4. Predict the molecular geometry and polarity of the CS2 molecule with VSEPR theory.

Which of the following molecules has a nonzero dipole moment?

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4+boro) = 12+4=160

S=C=S,

non polar linear (a é donoins, no one pot

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6. Which of the following molecules has a nonzero dipole moment?

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A BeCl.

(B) SF

What is the hybridization of as in the asf4- ion?

C. KIF D.CO

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E. CCL

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maxide (used as an adsorbent or a catalyst for organic reactions) forms when aluminum reacts with oxypen. If you want to learn more check out What are risk factors for developing eating disorders?
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Aluminum oxide (us

Al(s) +0.)

Al,048)

Balance the reaction. (2) A mixture of 82.49 g of aluminum and 11765 g of oxygen is allowed to react. What mass of aluminum oxide can be formed? We also discuss several other topics like What is global warming and how did it start?

YAI +302 2001 oz #-74 H.264 0-26 0-306

82.499#1. Ima s

86.909

amo na 40A

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= 155.9. Al2O3

3.057 molal

limiting

82.499 AL 'mop

20.08gHI 17.650 . Imeio =

6.0000

SE

7.353 molo

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99 Porcium chloride is used as a substitute for sodium chloride for individuals with high blood pressure Identify the limiting reactant and determine the mass of the excess reactant remaining when 7.00 g of chlorine gas reacts with 5.00 of potassium to form potassium chloride, We also discuss several other topics like Why is technological knowledge important?

Natci

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7.00 g ci

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7. What is the hybridization of As in the AsFc ion?

S+(4x

+ 1 -

A B. spl D.spd Esp'd If you want to learn more check out What is the main purpose of negative feedback?

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9. When PCs solidifies it forms PCL cations and PCI anions. According to valence bond theory are used by phosphorus in the PCL cation?

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ons. According to valence bond theory, what hybrid orbitals

A. sp

5+

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B. sp C.sp D. sp'd Esp'd

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11. Hyposulfite, SO, is a polyatomic ion that has not yet been definitively confirmed to exist. However, the VSAPR model may still be applied to yield a prediction on its molecular geometry. What is the most reasonable estimate for the O-S-O bond angle in hyposulfite?

A. 90° B) 106 C. 109.5° D. 112 E. 120

6+ (2x (+2

8+12=20

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6-S=

0

10

Tetroncaron

2 lone

12. Allene, CHA (shown below), is one component of gas used for high-temperature welding. According to the valence bood model, which is a proper description of the bonding on the central carbon atom in allene?

CCC

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X It shares four bonds, two with each carbon atom on either side. B. It shares four o bonds, two with each carbon atom on either side. Ce shares one o bond and one bond with cach carbon atom on either side. D. It shares two o boods with the carbon atom on the left, and two i bonds with the carbon atom on the right E. It shares two a boods with the carbon atom on the right, and two bonds with the carbon atom on the left.

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