Q: Given the electronegativity values of C ($$2.5) $$and O ($$3.5$$), illustrate the bond polarity in carbon monoxide ($$\mathrm{CO}) $$using delta notation.

$$\delta^+\text{C} - \delta^-\text{O}$$

Question 1

What is the VSEPR geometry of the carbonate ion ($$\mathrm{CO_3$^{2-}}$$)?

Accepted Answer

Trigonal planar

Question 2

Balance the following reaction and determine the sum of all coefficients: $$\mathrm{CH_4$ + O_2$ \rightarrow CO_2$ + H_2O}.$$

Accepted Answer

9

Question 3

In the balanced combustion reaction of octane ($$\mathrm{C_8H_{18}}$$), what is the coefficient in front of $$\mathrm{CO_2$}$$? $$\mathrm{C_8H_{18} + O_2$ \rightarrow CO_2$ + H_2O}$$

Accepted Answer

16

Question 4

Which molecule has a central atom that is $$\mathrm{sp^2$}$$ hybridized?

Accepted Answer

SO$$_2$$

Question 5

What is the formal charge on Cl in the perchlorate ion ($$\mathrm{$$ClO_4$$^-}$$)?

Accepted Answer

$$+1$$

Question 6

Which intermolecular forces are present in methanol ($$\mathrm{CH_3OH}$$)?

Accepted Answer

London Dispersion, Dipole-Dipole, and Hydrogen Bonding

Question 7

How many sigma and pi bonds are present in methane ($$\mathrm{CH_4$}$$)?

Accepted Answer

4 sigma, 0 pi

Question 8

How many lone pairs are present on the central atom in phosphorous trihydride ($$\mathrm{PH_3$}$$)?

Accepted Answer

1

Question 9

How many resonance structures does the formate ion ($$\mathrm{$$CHO_2$$^-}) $$have?

Accepted Answer

2

Question 10

Which element has the highest electronegativity?

Accepted Answer

F

Question 11

Which element has the lowest electron affinity?

Accepted Answer

Ne

Question 12

Which compound exhibits only London dispersion and dipole-dipole intermolecular interactions?

Accepted Answer

HI

Question 13

Which pure substance will have the highest boiling point?

Accepted Answer

CH$$_3NH$_2$$

Question 14

What is the bond angle in $$\mathrm{CF_4$}$$?

Accepted Answer

$$109.5^\circ$$

Question 15

What is the hybridization of the central atom in sulfur dioxide ($$\mathrm{SO_2$}$$)?

Accepted Answer

$$sp^2$$

Question 16

Given the electronegativity values of C ($$2.5) $$and O ($$3.5$$), illustrate the bond polarity in carbon monoxide ($$\mathrm{CO}) $$using delta notation.

Accepted Answer

$$\delta^+	ext{C} - \delta^-	ext{O}$$

Question 17

Is the ammonium ion ($$\mathrm{NH_4$^+}) $$polar or non-polar?

Accepted Answer

Non-polar

Question 18

Identify the type of reaction: $$\mathrm{2NH_3 \rightarrow N_2$ + 3H_2}$$

Accepted Answer

Decomposition

Question 19

Identify the type of reaction: $$\mathrm{3C + Fe_2O_3 \rightarrow 2Fe + 3CO}$$

Accepted Answer

Single Replacement

Question 20

Determine the formal charge of the least electronegative element in carbon tetrachloride ($$\mathrm{$$CCl_4$$}).$$

Accepted Answer

0

Formal Charge in Carbon Tetrachloride (CCl4)

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