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The typical K+ ion concentration in the fluid outside a cell is 0.005M, whereas that inside a cell is 0.15M. In active transport, cells use free energy stored in ATP to move ions in the direction opposite to their spontaneous direction of flow. Calculate the cost in free energy to move 1mol K+ through the cell wall by active transport. Assume no change in K+ concentrations during this process.
Perform whatever separations and tests you think necessary to determine which ions are in fact present
6NaOH + 2Al -> 2Na3AlO3 + 3H2 What volume of hydrogen gas (measured at STP) would result from reacting 75.0g of sodium hydroxide with 50.0g of aluminum?
What is the heat change in J associated with 65 g of gaseous acetic acid at 127 oC changing to solid at -50 oC? c(acetic acid) (g) = 1.11 J/(g.K) c(acetic acid) (liq) = 2.18 J/(g.K) c(acetic acid) (s) = 1.32 J/ (g.K) ?Hfus(acetic acid) = 192 J/g ?..
How many milliliters of 0.200 M NaOH will be required to titrate 19.6 mL of 0.479 M H2SO4
Using the equation pKa= -log Ka, calculate the Ka from the pH value and the starting acetic acid concentration. Calculate the Ka of acetic acid.
this solution was added 1.960 grams of KI and 50.00 mL of a 0.00923 M KIO3 solution. The excess I3- was titrated with 50.00 mL of a 0.02000 M Na2S2O3 solution. What was the mass percent of arsenic trichloride in the original sample?
Phosphorous trichloride (PCl3) is produced from the reaction of white phosphorous (P4) and chlorine: P4(s) + 6 Cl2(g) → 4 PCl3(g) . A sample of PCl3 of mass 298 g was collected from the reaction of 75.37 g of P4 with excess chlorine.
Explain briefly why CuSO4 is more soluble in water than in organic (nonpolar) solvent.
Use resonance structures to show which three carbon atoms bear the unpaired electron.
When the following equation is balanced, what is the mole ratio of H2O to Be3N2?
describe the mechanism for the reaction of bromine to Ethene and state the type
Which of the following is not a buffer solution?
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