Below is a structure of a surfactant/detergent: CH3- CH2 CH2 CH2 CH2 CH2 CH2 CH2 CH2 CH2. CH2 CH2 CH2 CH CH ´CH CH2 A Which of the following is correct about the polarity of soap? A is the polar tail and B is the non-polar head both A and B are non-polar A is the non-polar tail and B is the polar head both A and B are polar B is the non-polar tail and A is the polar head O B is the polar tail and A is the non-polar head

Below is a structure of a surfactant/detergent: CH3- CH2 CH2 CH2 CH2 CH2 CH2 CH2 CH2 CH2. CH2 CH2 CH2 CH CH ´CH CH2 A Which of the following is correct about the polarity of soap? A is the polar tail and B is the non-polar head both A and B are non-polar A is the non-polar tail and B is the polar head both A and B are polar B is the non-polar tail and A is the polar head O B is the polar tail and A is the non-polar head

Introductory Chemistry For Today

8th Edition

ISBN:9781285644561

Author:Seager

Publisher:Seager

Chapter7: Solutions And Colloids

Section: Chapter Questions

Problem 7.97E

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Soaps consist of compounds such as sodium stearate, CH3(CH2)16COO-Na + , that have both hydrophobic and hydrophilic parts. Consider the hydrocarbon part of sodium stearate to be the “tail” and the charged part to be the “head.”Grease is a complex mixture of (mostly) hydrophobic compounds. Which part of sodium stearate, head or tail, is most likely to bind to grease?
1) Consider the following 2 molecules: arsane which has the molecular formula AsH3, and dimethylether, an ether which has the molecular formula C2H6O.Which of these molecules is polar? a. Dimethylether is polar but arsane is not. b. Both are polar. c. Neither are polar. d. Arsane is polar but dimethylether is not. Consider a pure sample of silane which has the formula SiH4. Of the options listed below, what is the strongest attractive force in this sample? a. Ionic bonding b. Ion-dipole forces c. Hydrogen bonding d. Dispersion forces e. Dipole-dipole forces
What is the mas of 25.0ml of octane? D=.702g/cm3
It would be expected that the nonpolar compound naphthalene would be most soluble in which solvent? A) water polarity = 1.86 D b) ethanol polarity = 1.5 D c) liquid ammonia polarity = 1.46 D d) carbon tetrachloride polarity = 0 D
Given Lugol’s solution (5% w/v) from http://www.labchem.com/tools/msds/msds/LC15675.pdf How is it categorized according to health hazard? a. Category 0 b. Category 3 c. Category 1 d. Category 4
If the inside surface of each tube were coated with wax, would the generalshape of the water meniscus change? Would the general shape of themercury meniscus change?
TRUE OR FALSE 1. molecules with temporary dipole moment tend to align with opposite polarities in the solid phase for maximum attractive attraction. 2.the boiling point of compounds containing elements in the same periodic group is inversely proportional to the elements molar mass. 3.when adhesion is greater than cohesion, a convex appearance of the liquid in a tube is evident. 4.when cohesion is greater than adhesion, a concave appearance of the liquid in tube is evident.
1)An carbon monoxide molecule (formula CO) can form a hydrogen bond to a water molecule. TRUE/FALSE 2. An methane molecule (formula CH4) can form a hydrogen bond to a water molecule. TRUE/FALSE 3. Determine the volume of 17.4 M acetic acid, CH3COOH, needed to prepare 270 mL of 1.25 M solution. A. 23.51 mL B. 17.87 mL C. 22.54 mL D. 19.40 mL E. 15.63 mL
1. Which aqueous solution will boil at the highest temperature? a. 1.0 m CaCl2 b. 0.5 m C6H12O6 c. 0.5 m AlCl3 d. 1.0 m C2H5OH 2. Rank the following with increasing acidity: CH3OH, HCl, NH3, and CH4 3. Select the correct molecule with the lowest surface tension. a. CH3CH2CH2OH b. CH3CH2CH2NH2 c. CH3CH2CH2CH3 d. CH3CH2CH2Cl
Why is water(H2O) more polar than NH3 and CH4?
2.1 Consider the table below. Compare the boiling points of 3 molecules with the same molar mass. Mm bp, °C m* C3H8 44 231 0.1 CH3CHO 44 294 2.7 CH3CN 41 355 3.9 m* is the bond dipole which is a measure of polarity of a bond in a molecule 2.2 A concentrated perchloric acid solution has a density of 1.67 g/mL at 25°C and is 11.7 M. What is the percent by mass of HClO4 in the solution? 2.3 Given the initial rate data for the decomposition reaction, A → B + C. Determine the rate expression for the reaction. [A], M –Δ[A]/Δt M/s 0.084 12.4 × 10–6 0.063 9.3 × 10–6 0.042 6.2 × 10–6
Indicate the strongest intermolecular attraction between each pair of molecules. __________ NH3 and H2O __________ NH3 and NH3 __________ NH4+1 and NH3 ___________ CH4 and NH3 ___________ CH4 and CH4 a. London's b. dipolar c. hydrogen bond d. ion to dipole

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