#Question id: 396
#Unit 1. Molecules and their Interaction Relevant to Biology
Identical heat lamps are arranged to shine on two identical containers, one containing water and one methanol (wood alcohol), so that each liquid absorbs the same amount of energy minute by minute. The covalent bonds of methanol molecules are nonpolar, so there are no hydrogen bonds among methanol molecules. Which of the following graphs correctly describes what will happen to the temperature of the water and the methanol?
#Question id: 395
#Unit 1. Molecules and their Interaction Relevant to Biology
How would acidification of seawater affect marine organisms? Acidification of seawater would ________.
#Question id: 394
#Unit 1. Molecules and their Interaction Relevant to Biology
What will be the H+ ion concentration in a solution prepared by mixing 50.0 mL of 0.20 M NaCl, 25 mL of 0.10M NaOH and 25.0 mL of 0.30M HCl?
#Question id: 392
#Unit 1. Molecules and their Interaction Relevant to Biology
When an ionic compound such as sodium chloride (NaCl) is placed in water, the component atoms of the NaCl crystal dissociate into individual sodium ions (Na+) and chloride ions (Cl-). In contrast, the atoms of covalently bonded molecules (e.g., glucose, sucrose, glycerol) do not generally dissociate when placed in aqueous solution. Which of the following solutions would be expected to contain the greatest number of solute particles (molecules or ions)?
#Question id: 388
#Unit 1. Molecules and their Interaction Relevant to Biology
Calculate the pH of a solution prepared by mixing 2.0 mL of a strong acid solution of pH=3.0 and 3.0 mL of a strong base of pH=10.0.
#Question id: 386
#Unit 1. Molecules and their Interaction Relevant to Biology
Which of the following properties of water does not contribute to the fitness of the aqueous environment for living organisms?