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chem final

exam 3

what is the pH of a soln. with [H3O+]=3.0 times 10 to the neg 3 M pH = -log [3.0 times 10 to the neg 3] 2.52
The process of crenation occurs when the concentration outside a cell is...... and is said to be.... higher in concentration that inside the cell, hypertonic
which of the following is the storage form of glucose in the liver and muscle tissues? glycogen
amino acids that are not synthesized in the body and must be obtained from the diet are called: essential
which of the following is the weakest acid? HCO3- with pKa=10.32
How many grams of glucose are needed to prepare 400 mL of a 2.0% (m/v) glucose solution? 8.0 g
the function of a buffer is to: maintain the pH of a solution
at physiological pH, glutamate has a form, what is the side chain?? acidic
post meal blood glucose level. convert 180 mg/dL to millimolar 10 mM
Bicarbonate, HCO3-, has a pKa=10.32. which form will predominate when the pH of the bicarbonate solution is 12.00? CO32-
what is the concentration of a soln. made by adding 200 mL of water to 100 mL of 12% KCL solution? 4.0%
what is the [H3O+] for a solution with pH=11.61 10^(-11.61)=2.45 time 10^-12 M
Ribulose has the following structure. To what class does the ribulose belong? ketopentose
which of the following is a buffer system? H2CO3 and KHCO3
what type of interaction would you expect between the following R groups in the tertiary structure of a protein? salt bridges
In the figure above, the monosaccharide unit on the right is a: aldohexose
in the figure above, the monosaccharide unit on the left is a: ketohexose
The disaccharide shown above contains a.... glycosidic linkage. alfa 2,6
A peptide bond contains which kind of functional group? amide
the neutralization reaction between Al(OH)3 and HNO3 produces the salt with the formula Al(NO3)3
what volume of a 15% (m/v) NaOH soln. will contain 120 g NaOH? 800 mL
what amino acids have polar side chains that are attracted to water? HYDROPHILIC
what would be the overall charge of the dipeptide shown below at a pH=12 -1
ethylene glycol C2H6O2, molar mass=60.06 g/mol. a soln containing 86.0 g of ethylene is dissolved in 465 g water with a density of 1.35 g/ml(%m/m)of ethylene glycol in soln. 86/551 times 100= 15.6%
whats the molarity of ethylene in soln? 3.43 M
Hypotonic? to low concentration
hypertonic to high concentration
isotonic same concentration
RBC undergoes lyses in water, why? concentration diffs
why do proteins fold- hydrophobic , and hydrophilic...r groups asdf
Created by: sarah.rushton298