Legal issues are important in the blood bank. Discuss how negligence and malpractice are cause for concern with laboratory/ phlebotomy professionals with both donor and patients.
In: Chemistry
The pKbpKb values for the dibasic base BB are pKb1=2.10 and pKb2=7.73.
Calculate the pH at each of the points in the titration of 50.0 mL of a 0.90 M B(aq) solution with 0.90 M HCl(aq).
What is the pH before the addition of any HCl?
pH=
What is the pH after the addition of 25.0 mL HCl?
pH=
What is the pH after the addition of 50.0 mL HCl?
pH=
What is the pH after the addition of 75.0 mL HCl?
pH=
What is the pH after the addition of 100.0 mL HCl?
pH=
In: Chemistry
What property enables you to classify an alcohol as primary, secondary, or tertiary?
What do all compounds classified as aromatic compounds have in common and why are they called aromatic?
In: Chemistry
A gaseous mixture of propane, carbon dioxide and hydrogen with a mixture total mass m = 188 g occupies a volume V = 33 L at t = 88
In: Chemistry
In: Chemistry
2-6.
(i) Considering the effects of the ionic strength, use Excel to calculate the cell voltage of Zn | ZnSO4 (x M) || PbSO4(s) | Pb, where x: 1´10-4, 5´10-4, 1´10-3, 5´10-3, 0.01, and 0.05 M.
PbSO4 → Pb2+ + SO42+, Ksp = 1.69 ´ 10-8
Pb2+ + 2e- → Pb, Eo = -0.13 V vs. NHE
Zn2+ + 2e- → Zn, Eo = -0.76 V vs. NHE
(ii) Recalculate the cell voltage when 1.0 M KNO3 is present in the anodic half-cell.
(iii) Plot the results of (i) and (ii) against log(x) together on one sheet.
(iv) Give conclusions on the difference between the curves.
Thank you.
In: Chemistry
|
A solution contains 10.10 gg of unknown compound dissolved in 50.0 mLmL of water. (Assume a density of 1.00 g/mLg/mL for water.) The freezing point of the solution is -6.05 ∘C∘C. The mass percent composition of the compound is 38.70% CC, 9.74% HH, and the rest is OO. |
Part A What is the molecular formula of the compound? Express your answer as a molecular formula.
|
In: Chemistry
A student carried out reactions A through D as designed in Table 1 in your electronic lab manual, plotted log(rate) vs. log(I-) in EXCEL, and the linear regression yielded the following equation: y = 2..732x-1.032; and the plot of log(rate ) vs. log [IO3-] yield y = 1.368x-1.674.
The order for I- is?
The order for IO3- is?
In: Chemistry
Question #2 (5 pts): Compare the G proteins that acts in transducing the signal from b-adrenergic receptors, and Ras. What properties do they share? How do they differ? What is the functional difference between Gas and Gai?
In: Chemistry
Pick a number between 100 and 1000. For that energy in kJ/mol, what are the associated wavelength (nm), frequency (1/s = Hz) and wavenumber (cm-1)?
In: Chemistry
Hydrogen gas is used as a fuel instead of fossil fuels. Storage of hydrogen is a challenge. One avenue of research involves chemical storage such as incorporating hydrogen as part of a metal hydride. In the following reaction sodium borohydride, NaBH4, is used as a means for storing and later generating the hydrogen gas in situ where it is needed as a fuel. Application of heat and use of a catalyst drives the reaction forward. NaBH4(s) + 2 H2O(l) → NaBO2(s) + 4 H2(g) To test the efficiency of the reaction, 0.11 g of sodium borohydride is catalytically decomposed and 244 mL of hydrogen gas is collected over water at 30.0 °C under an atmospheric pressure of 752 mmHg. Calculate the % yield of the reaction
In: Chemistry
The following reaction is first order in N2O5:
N2O5(g)?NO3(g)+NO2(g)
The rate constant for the reaction at a certain temperature is 0.053/s.
A)
Calculate the rate of the reaction when [N2O5]= 5.4
In: Chemistry
which of the following is a process with a negative S?
In: Chemistry
A solution of a specific vitamin has λmax = 287 nm and a concentration of 8.76 × 10-7 M. The absorbance of the solution at 287 nm is A = 0.190. What is the molar absorptivity of the vitamin at 287 nm? (sample pathlength = 1.00 cm)
In: Chemistry