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Lactase, an enzyme found in the small intestine, cleaves the milk sugar lactose to yield glucose and galactose. Assuming that the km for lactose is 0.9mM, vmax is 3.5 micromole/min/mg lactase, 5.7 micromoles lactose is presesnt, and the rxn mixture volume is 80 ml, calculate how much glucose would be formed in one minute by one mg of lactase.
What is the pH of a phosphate buffer when [H2PO4-] = 40 mM and [HPO42-] = 30 mM?
A buffer solution contains 0.10 mol of acetic acid and 0.13 mol of sodium acetate in 1.00 L. (a) What is the pH of this buffer? (b) what is the pH of the buffer after the addition of 0.02 mol of KOH? (c) What is the pH of the buffer after the addi..
how many grams of NH3 will be produced? Which reactant remains in excess, and in what mass?
Graphite Furnace vs ICP, with investigating and writing a proposal for Heavy metal testing using Graphite Furnace.
Volume after mixing is 131mL. Kf=1.86 C/m -- Kb=0.512 C/m Calculate the freezing point and boiling point?
Why could you have predicted that the pH would rise after addition of sodium acetate to pure 0.40 M acetic acid from part (a) by applying Le Chatelier's principle
Calculaw the concentration of hydroxide ions in stomach acid at body temperature. ([H3O^+]=0.10M)
The amount of nut burned was 0.9905g. How many of these nuts would a 64kg person have to eat to obtain enough energy to bike (racing)for 30min. The amount of bicycling (racing) is 0.127
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of BrO3- is tripled and that of Br- is tripled
For the chemical reactions shown below, calculate the number of electrons transferred in the redox process. 2Cr2(O7)2- (aq) + 16H+ (aq) --> 4Cr3+ (aq) +3O2 (g) + 8H2O (l)
determine the net change of oxidation number of each of the elements in the redox equations.
Multiple choice questions in nuclear chemistry - which equation represents the balanced nuclear equation
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