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Explain what are the potential sources of error for determining the molar extinction coefficient for methylene blue? Explain which sources contribute most to the uncertainty in the coefficient?
How many milliliters of 6 M HNO3 would you add to 300 mL of the buffers solution to change the pH from 5.09 to 5.03?
Calculate the value of Delta S in heating 3.5 moles of a monatomic ideal gas
Can there be two substances containing the same of carbon, hydrogen and oxygen atoms but one gives a positive Iodoform and negative Benedict's test while the other gives negative Iodoform and positive Benedict's test
How many mL of a 2.0 M solution of NaOH would bve needed in order to have 0.500 mol of NaOH? (Molar mass of NaOH is 40.0 g/mol)
Which of the following is true about any R enantiomer. A. it has a + rotation b. it has a - rotation c. it is a mirror image of the S enantiomer is it A only B only A and C or B and C
A 0.040 M solution of a monoprotic acid is 14 percent ionized. Calculate the ionization constant of the acid.
If one needed to predict the temperature change when a series of metals with equal mass are heated, which of the following values would need to be obtained from a reference
Presuming that 3 H+ are transported per ATP synthesized in the mitochondrial matrix, the membrane potential difference is 0.18 V (negative inside) as well as the pH difference is 1unit (acid outside, basic inside), compute the largest ratio of [AT..
For the following reaction at equilibrium at 445 celsius the partial ressures were found to be ; [H2] = 0.45 atm, [I2] =0.10 atm and [Hi]=1.53 atm. calculate Kp for this reactino H2(g)+I2(g)---->2HI(g)
The mixed solution requires 28.55 ml of the EDTA solution to reach the end point. A similar amount of MgCl2 solution requires 2.60 ml to reach the endpoint.
a why is the term single replacement reaction used to describe thereaction between sodium metal and water
Calculate the radiation dosage (in grays) for an 57-kg person that is exposed for 3.0 seconds to a 3.0 Ci source of beta radiation.
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