Which of the following statements about water is correct? Polar substances that can form hydrogen bonds will dissolve in it Nonpolar substances like oils are not soluble in it All of these It is critical for many of the chemical processes found in living systems TRUE ANSWER : ? YOUR ANSWER : ?
The reason that fats contain more energy than simple sugars, is fats have many more carbon atoms hydrogen bonds hydrogen atoms covalent bonds TRUE ANSWER : ? YOUR ANSWER : ?
The strength of an acid depends on number of double bonds number of neutrons gain number of protons released electronegativity TRUE ANSWER : ? YOUR ANSWER : ?
The dissociation constant of H2O at 25° C is 107 M 10-14 M 10-7 M 1014 M TRUE ANSWER : ? YOUR ANSWER : ?
The effectiveness or capacity of a buffer solution can be affected by concentration of the conjugate base to the weak acid both (a) and (b) molar concentration of the buffer components temperature of buffer components TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statements about covalently bonded molecules is false? Electrons are shared between the atoms that make up the molecule The chemical bonds that hold the molecule together are relatively strong Such molecules often result from the interaction of ionized atoms Noncovalent bonds may also be present, especially if the molecule is large TRUE ANSWER : ? YOUR ANSWER : ?
The main difference between an acid and a base is that bases are polar molecules and acids are not acids donate hydrogen ions in water while bases accept hydrogen ions bases donate hydrogen ions in water while acids accept hydrogen ions acids are polar molecules and bases are not TRUE ANSWER : ? YOUR ANSWER : ?
A solution with pH = 5 is __________ than a solution with pH = 7. 10 times more acidic 10 times more basic 2 times more basic 100 times more acidic TRUE ANSWER : ? YOUR ANSWER : ?
The elements oxygen, nitrogen, and carbon are common elements in the molecules that make up living organisms contain protons and neutrons in their atomic nuclei can all form covalent bonds with other elements All of these TRUE ANSWER : ? YOUR ANSWER : ?