1. What is the difference between soap and detergent?

3a) The molecule ethyne (or acetylene), which has the molecular formula C₂H₂, contains two carbon atoms with linear geometry. Construct a model of ethyne by first connecting two black balls with three springs. Use two short sticks and two yellow balls to complete the structure. Sketch a perspective representation (a three dimensional drawing) of the structure.

Does US Environmental Protection Agency (EPA) have Maximum Contaminant Levels (MCLs) for per-and polyfluoroalkyl (PFAS) in drinking water? If yes, what are they? If no, what other levels are used for PFAS? Are they mandatory?

QUESTION 37 Identify the compound that can form hydrogen bonding? O A. CC14 O B. NO2 O C. CH4 O D. HF QUESTION 38 The structure of DNA is best described as O A. a double helix O B. a chain folded into a compact 3D shape O C. a lipid bilayer O D. a branched glucose polymer QUESTION 39 A solute is most likely to be highly soluble in a solvent if the solute is O A. nonpolar; ionic O B. nonpolar; polar O C. polar; nonpolar O D. polar; polar and the solvent is

Look up the formulas and correct Lewis structures for Pentane and Tetrachloromethane. Then explain the relative positions of the boiling points. 1000, Boiling Point 76.5/ 100 36.1/ Pentane Tetrachloro-/iWater/ methane 800 760 600 Atmospheric Pressure 400 200 20 40 60 80 100 Temperature (°C) Vapor pressure (mm Hg)

Which statement explains why ethene does not dissolve in water? Ethene is polar and water is polar. Ethene is polar and water is nonpolar. Ethene is nonpolar and water is polar. Ethene is nonpolar and water is nọnpolar.

4. What is the ThOD of a solution containing 130 mg/L sucrose (C₁2H22O11)? C12H22O11 + 12 O₂ → 12 CO₂ + 11 H₂O

Highlight the functional groups in the following organic compounds and identify them.

What effect does acid rain have on the environment on a macrocosmic scale? How do storms carry acid rain from place to place?

The monomers of lipids are called fatty acids. Draw the lipid monomer a fatty acid, labeling the hydrocarbon chain and the carboxyl end group. Be sure to show ALL of the atoms within the molecule (there are several different fatty acids in living things including oleic acid and stearic acid, each with a unique molecular formula). Do not give handwriting solution.