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Given that a 0.160 M HCl(aq) solution costs $39.95 for 500 mL , and that KCl costs $10/ton,
which analysis procedure is more cost-effective?
How many hemoglobin molecules are there in an average red cell? Assume that the molecular weight of the human hemoglobin tetramer is 65 kd. (The answer is 2.74x10^8, but I don't know how to calculate it)
a hypothetical metal has a face-centered cubic unit cell and a density of 6.12 gcm3. the molar mass of the metal is
A gas is heated from 269 K to 283 K while its volume is increased from 21.5 L to 37.0 L by moving a large piston within a cylinder. If the original pressure was 1.10 atm, what would be the final pressure?
According to the general trend in electron affinities, which group (or family) of elements tend to form the most stable anions
What weight of solid glycine pk1=2.4, and pk2=9.6 and what volume of 1.0 M HCl are required to make 100ml of .3 M buffer ph 2.4. please descrribe each step you do in DETAIL so i can understand process and use correct units please
When a 0.325 g sample was studied by combustion analysis, 0.583 g of CO2 and 0.0790 g of H2O formed. How many moles of each of the following were in the original sample and what is the molecular formula
Explain how many grams of C2H2 must burn according to the equation below in order to heat 2.34x104 grams of H2O from 25*C to 50*C. C2H2(g) + 5/2 O2(g) > H2O(l) + 2CO2(g) (Delta H = -1212kJ)
A solution, made by dissolving 62.07 g of a nonelectrolyte in 500 g of H2O, exhibits a freezing point of -1.86 °C. Determine the molecular weight of this nonelectrolyte compound? For water Kf = 1.86 °C m-1Kb = 0.51 °C m-1
Consider the titration of 41.2ml of 0.270M HF with 0.180M NaOH. Calculate the ph at each of the following points. how many milliliters of base are required to reach the equivalence point?
An acid-base equilibrium system is created by disolving 0.10 mol HF in water to a volume of 1.0 L. What is teh effect of adding 0.050 mole F-(aq) to this solution. a. the pH of the solution with decrease
At pH 12, magnesium hydroxide is insoluble and does not react with EDTA. The titration of a hard water sample at pH 12 thus yields results for calcium only. A 250.0-mL sample of tap water was adjusted to pH 12 and titrated with 0.01056 EDTA using ..
To a buffer solution containing 0.100M of HNO2 and 0.150M of KNO2 with calculations determine if the added amount of the following compounds exceeds its buffer capacity.
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