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Problem- Part 1- Which will have a greater absorbance as measured by a spectrometer: weak ice tea or strong ice tea? Which will have a greater transmittance?
Part 2- Why do we usually use the wavelength of maximum absorbance( max) to make quantitative measurement of concentration?
Part 3- When a Beer law calibration curve is constructed, what variables are plotted on the x and y axes? what is obtained from the slope of the line generated?
Part 4- What solvent will be used as the reference solvent (or blank) in the spectrometer?
Part 5- What is the purpose of adding ammonium hydroxide to the aqueous solution of copper ions?
Solve the above problem in detail no word count
Problem- A polypeptide contains 3 lys and 2 arg residues (internal). Assuming cleavage was 100% efficient how many peptide fragments can be expected after cleavage with enzyme trypsin
a/ The PCL3 (g) initial pressure is 2.00 atm and the initial pressure for Cl2(g) is 1,00 atm. determine the pressure at equilibrium for each gas. PCL3(g) + Cl2(g) OCL5(g) Kc=1.19
A solution is prepared by dissolving 17.6g Ammonium sulfate(NH_4)_2SO_4 (Molar Mass: 132.17g/mol) in enough water to make 121.0mL (0.121L) of stock solution. A 12.30mL (0.0123L) sample of this stock solution is added to 59.00mL of water. Calculate..
The oil produced from eucalyptus leaves contains a vloatile organic compound eucalyptol. At 190 degrees c, and 60.0 torr, a sample of eucalyptol vapor had a density of 0.32g/L. Calculate the molar mass of eucalyptol
If 164 of wet is collected over water at 24 degrees C and a barometric pressure of 737 Torr , how many grams of Zn have been consumed? (The vapor pressure of water is 22.38 Torr)
A common mineral in earth's crust has the chemical composition 45.51% Cu, 20312% Si, and 24.37 O, by mass. Explain what is its empirical formula
Assess the feasibility of the reaction: N2H4 (g) + 2OF2 (g) ® N2F4 (g) + 2H2O (g) by determining each of the following quantities of this reaction at 25 oC.
if 32ml of 7.0m h2so4 was spilled what is the minimum mass of nahco3 that must be added to the spill to neutralize the
A supernatant from a saturated calcium hydroxide solution is titrated with a standardized hydrochloric acid solution to the methyl orange endpoint
what is the molarity of all solutes in this solution. what is the osmotic pressure of the solution at 25 C. assume total dissociation of NaCL.
Calculate how much heat is required to added or removed to convert 100.0 g of steam at 115 0C to liquid water at 65 0C?
A volume of 40.0 mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the solution if 19.2 mL of 1.50 M H2SO4 was needed? The equation is 2KOH(aq)+H2SO4(aq)=K2SO4(aq0+2..
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