A neutral solution... a. has no H+ b. has no OH c. has equal amounts of Ht and O

Question

A neutral solution... a. has no H+ b. has no OH c. has equal amounts of Ht and OH- d. is hydrophobic e. has a pHi of 0 Buffers prevent wide swings in pH. Hw do buffers work? a. Soak up extra acid and base b. Accept or release H+ c. Accept or release OH d. Convert Ht and OH- to water e. Monitor the blood pH Polar covalent bonds form when... a. electrons are shared unequally between atoms. b. more than one pair of electrons is shared c. ions are formed. d. an acid and base are combined e. atoms from two molecules are attracted to each other. The hydrogen bond between two water molecules arises because water is a. polar. b. nonpolar c. a liquid. d. a small molecule. e. hydrophobic. Water moves through a plant because of the property of a. high heat of fusion b. high heat of vaporization c. high specific heat d. cohesion As ice melts, it: a. Absorbs heat from its surroundings b. Becomes less dense c. Increases its property of cohesion d. Increases its heat of vaporization Which of the following best explains the molecular complexity of living organisms? Think! a. The large number of different monomers allows the construction of many polymers. b. Each organism has its own unique set of monomers for use in constructing polymers. c. Condensation reactions can create different polymers because they can use virtually any molecu the cell d. While there are not many macromolecules in cells, each one has many different functions. e. A small number of monomers can be assembled into large polymers with many different seque

Explanation / Answer

AS PER CHEGG POLICY, PROCEEDING TO ANSWER ONLY THE FIRST 4 QUESTIONS/SUBPARTS, THAT IS, QUESTIONS 1 TO 4:

Q.1 A neutral solution...
c. has equal amounts of H+ and OH- - this is because it is neutral so it should not be carrying any net charge which is ony possible if the charged molecules are in equal concentration.

Q.2 Buffers prevent wide swings in pH by working:
b. Accepting or releasing H+ - this is because the addition of a strong base or an acid leads to neutralization of the charged molecules proceed to yield neutral substances such as water and hence only a very slight change in pH occurs.

Q.3 Polar covalent bonds form when:
a. Electrons are shared unequally between atoms - this is because covalent bonds are formed by the sharing of electrons so that each attains their stable valence shell electronic configuration, and differences in electronegativity of participating atoms causes the polar nature.

Q.4 The hydrogen bond between two water molecules arises because water is:
a. Polar - The angle between the two H-O bonds and Oxygen atom's highly electronegative nature causes the covalent bond to take up a polar nature, leading to suitable conditions on the Hydrogen atom to form weak associations with a more partially negative atom.

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