Water, pH and Macromolecules Which of the following acid/base pairs act as natural buffers in living systems? H2CO3/HCO3- Histidine+/histidine H2PO4-/HPO42- All of these H2CO3/HCO3- Histidine+/histidine H2PO4-/HPO42- All of these ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Weak acids generally have pKa that cannot be used to buffer been seldom found in living systems values less than 1 pKa values greater than 2 that cannot be used to buffer been seldom found in living systems values less than 1 pKa values greater than 2 ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Which of the following will easily dissolve in a polar solvent? methane sodium chloride argon gasoline (heptanes & octanes) methane sodium chloride argon gasoline (heptanes & octanes) ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules Which of the following statements about water is correct? Nonpolar substances like oils are not soluble in it It is critical for many of the chemical processes found in living systems Polar substances that can form hydrogen bonds will dissolve in it All of these Nonpolar substances like oils are not soluble in it It is critical for many of the chemical processes found in living systems Polar substances that can form hydrogen bonds will dissolve in it All of these ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules The dissociation constant of H2O at 25° C is 107 M 1014 M 10-14 M 10-7 M 107 M 1014 M 10-14 M 10-7 M ANSWER DOWNLOAD EXAMIANS APP
Water, pH and Macromolecules The main difference between an acid and a base is that acids donate hydrogen ions in water while bases accept hydrogen ions bases are polar molecules and acids are not acids are polar molecules and bases are not bases donate hydrogen ions in water while acids accept hydrogen ions acids donate hydrogen ions in water while bases accept hydrogen ions bases are polar molecules and acids are not acids are polar molecules and bases are not bases donate hydrogen ions in water while acids accept hydrogen ions ANSWER DOWNLOAD EXAMIANS APP
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