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Explain milk sours in about 20h at 28 degrees Celsius. Stored in a refrigerator at degrees Celsius, milk sours in about 10 days. Explain what is the activation energy for souring of milk?
How many possibilities are there to assort the billiard balls in a line (include the (white) cue ball)? How many possibilities are there to arrange 6 red and 6 yellow balls in a line?
What is the molecular weight of a gas if a 250 mL sample of this gas collected over water at 735 mm Hg and 28.0°C has a mass of 1.25 gram? The equilibrium vapor pressure of water at 28.0°C is 28.3 mm Hg.
a draw the three isomers of benzenedicarboxylic acid.b the isomers have melting points of 210 degc 343 degc and 427
A substance has an extinction coefficient of 5 x 10^5 L cm^-1 mol^-1. A concentrated solution of this substance has an absorbance too high to measure. You dilute 1 ml of this solution to 25 ml with distilled water; the measured absorbance is 0.2.
If .050 moles of HA were dissolved in 1L of water, calculate the concentration of [HA], [H30+], and [A-] in the solution at equilibrium. What is the pH? Ka=7.94 x 10^-7, equivalence point ~ 9 mL, pH at equivalence ~ 9]
What will the following peptides look like structurally at pH 1, pH 7, pH 12. (You will draw 3 structures for each.)
n2h4l o2g -gt n2g 2 h2ol h -622.2 kjcalculate the heat of reaction for the same reaction where water is a gaseous
you have prepared a saturated solution of x at 20c using 27.0 g of water. how much more solute can be dissolved if the
Write the half reactions and the blanced equation for the galvanic cell: Ag(s) | AgCl(s) | Cl^-(aq) || Cl^-(aq) | Hg_2Cl_2(s) | Hg(l).
how many moles of nitrogen are in 5.3 L container at 1.25 atm and a temp of 85 degrees C.
two solutions are prepared using the same solutesolution a 0.14g of the solute dissolves in 15.4 g of t-butanol.
What would be the concentrations of acetic acid and sodium acetate in this solution. Would we expect this solution to be a buffer
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