empirical formula files question 3, chemistry homework help
  1. The density of cylindrical object weighs 1.94 g/mL. What volume does the 3.00g object occupy?
  2. Answer the following questions based on the techniques used in Experiment 3: Separation of a Mixture
  3. Using Chemsketch drawing software draw two of the three apparatus used to separate the mixture in Experiment 3: Separation of a Solid. Develop a flow chart to separate the mixture in Experiment 3.
  4. A mixture contained 0 .8 grams of salt, 1.3g of SiO2, and 2.5g of NH4Cl. What is the percent composition of the mixture?
  5. A sample of a substance was determined and contained 1.0g of Mg and 1.75g of O. What is the empirical formula?
  6. Use the figure below to answer the following questions. Show all work for full credit. (20 pts)

Figure 1

30mL of

0.400M NaOH

Vinegar

  1. Write the neutralization reaction for this experiment.
  2. Calculate the concentration of acetic acid in flask A.
  3. Calculate the concentration of acetic acid in flask B.
  4. Calculate the concentration of acetic acid in flask C.
  5. Determine which concentration/flask should be used to calculate the percentage of acetic acid in our vinegar. Calculate the percentage of acetic acid. Assume the density of vinegar is 1.00g/mL.
  6. 11.0g of zinc metal is heated to 100⁰C is placed in 100.0 g of water (The initial temperature if the water was 25.5⁰C). The final temperature of the water after is 27⁰C. Calculate the heat gained by the water. (10 pts)
  7. Use the figure below to answer the following questions

Figure 2

0.6g of a new cyanine dye A is used to make 200mL of a solution. What is the concentration of the dye? (15 pts)

  1. How are percent transmittance and absorbance related mathematically? What would be the absorbance of a sample with 20% transmittance? (10 pts)
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