Questions: 5. Which one of the following molecules is polar? a. NH3 a. BeCl2 b. SiBr3 c. CCl4 d. O2

5. Which one of the following molecules is polar? a. NH3 a. BeCl2 b. SiBr3 c. CCl4 d. O2
Transcript text: 5. Which one of the following molecules is polar? a. $\mathrm{NH}_{3}$ a. $\mathrm{BeCl}_{2}$ b. $\mathrm{SiBr}_{3}$ c. $\mathrm{CCl}_{4}$ d. $\mathrm{O}_{2}$
failed

Solution

failed
failed

Solution Steps

Step 1: Understanding Molecular Polarity

Molecular polarity is determined by the distribution of electric charge around the molecule. A molecule is polar if it has a net dipole moment, which occurs when there is an uneven distribution of electrons across the molecule. This typically happens when there are polar bonds and the molecular geometry does not cancel out these dipoles.

Step 2: Analyzing Each Molecule

  • $\mathrm{NH}_{3}$ (Ammonia): This molecule has a trigonal pyramidal shape due to the lone pair on the nitrogen atom. The N-H bonds are polar, and the geometry does not cancel out the dipole moments, making $\mathrm{NH}_{3}$ a polar molecule.

  • $\mathrm{BeCl}_{2}$ (Beryllium Chloride): This molecule is linear, and the dipoles from the Be-Cl bonds cancel each other out, resulting in a nonpolar molecule.

  • $\mathrm{SiBr}_{3}$: This molecule is not a common or standard chemical formula. Assuming it is a typo or hypothetical, if it were to exist, the geometry and polarity would depend on its actual structure, which is not specified here.

  • $\mathrm{CCl}_{4}$ (Carbon Tetrachloride): This molecule has a tetrahedral shape, and the dipoles from the C-Cl bonds cancel each other out, making it nonpolar.

  • $\mathrm{O}_{2}$ (Oxygen): This is a diatomic molecule with no difference in electronegativity between the two oxygen atoms, making it nonpolar.

Step 3: Identifying the Polar Molecule

From the analysis, $\mathrm{NH}_{3}$ is the only molecule with a net dipole moment due to its trigonal pyramidal shape and polar N-H bonds.

Final Answer

The polar molecule is \(\boxed{\mathrm{NH}_{3}}\).

Was this solution helpful?
failed
Unhelpful
failed
Helpful

Questions asked by other users

failedAnswered
Based on the information below create a multiple step income statement for the year ended December 31, 2024 Sales Revenue 2,000 Sales Discount 10,000 Sales Returns and Allowances 130,000 Cost of goods Sold 25,500 Selling Expenses 15,400 General and Administrative Expenses 3,000 Income tax rate is 21%
failedAnswered
5. Compute the probability that a 5 -card poker hand is dealt with 4 Aces.
failedAnswered
Find the gross income, the adjusted gross income, and the taxable income on the taxpayer's income tax return. Base the tax on the taxable income. He earned 17,500, received 121 in interest from savings account, and contributed 2900 to an IRA.
failedAnswered
Lisa has collected data to find that the number of pages per book on a book shelf has a normal distribution. What is the probability that a randomly selected book has fewer than 169 pages if the mean (μ) is 189 pages and the standard deviation (σ) is 20 pages? Use the empirical rule. Enter your answer as a percent rounded to two decimal places if necessary. Provide your answer below: %
failedAnswered
a) (x+9)^2 x^2+2 cdot x cdot 9+9= x^2+18x+81 b) (3-a)^2= 3-a^2 x C) (x+7) cdot(x-7)= x^2-7 x+7 x^2+7 x= x^2-14 x^2 D) (x+2 y) cdot(x-2 y)= x^2-2 y x+2 y x-4 y^2 e) (3 y^2-2)^2=