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EITHER camphor (C10H16O)or naphthalene (C10H8)can be used to make mothballs. A 5 gram sample of mothballs purchased at K-Mart was dissolved into 100 grams of ethyl alcohol and the resulting solution had a boiling point of 78.89 degrees C. Determine what the mothballs were made of. Pure ethyl alcohol has a boiling point of 78.41 degrees C and Kb = 1.22 deg C/m for this solvent.
a. camphor
b. naphthalene
c. neither was used
d. camphor and water was used
e. half camphor and half naphthalene
a titration required 18.38 ml of 0.1574 M NaOH solution. How many moles of NaOH were in this volume?
When adjusted for any changes in delta h and delta S with temperature, the standard free energy change delta G at 500K is equal to 9.8x10 4 J/mol.
Explain briefly why CuSO4 is more soluble in water than in organic (nonpolar) solvent.
In a 0.1 molar solution of NaCl in water, which one of the following will be closest to 0.1?" A) the mole fraction of NaCl B) The mass fraction of NaCl
List a balanced chemical equation for each of these chemical reaction types and explain how it is used
Sketch Flow diagram and explain the extraction process - What is the purpose of extracting the organic layer with water in the first extraction step?
PH of solution during titration process, Q1: What is the pH of a 0.35 M solution of a weak acid HA with Ka = 1.41×10^-8?
The enzyme, carbonic anhydrase, is a large zinc-containing protein with a molar mass of 3.00 × 104 g/mol. Zn is 0.218% by mass of the protein.
How many grams of O2 will be required to completely react with 2.43 grams of Mg metal ribbon to produce MgO.
Molarity is only one of many ways to express concentration. Another is percent mass per volume or %(m/v). For example, vinegar usually contains about 5 %(m/v) acetic acid(5g acetic acid/100 mL vinegar)
Calculate the pH of the following solutions A) 0.10 M hydrogen sulfide? B) 1.0*10^-4 M benzoic acid (check Ca/Ka ratio)? C) 0.09 M methylamine
Describe the biogeochemical cycles for H2O, C and N and describe how human activities have thrown them out of their natural balance.
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