Beer's Law

#3) Using Beer's Law and the attached data. 1. Calculate the concentration of each calibration standard. 2.Plot the data on the attached graph paper. 3. Calculate the slope. What is the average slope? What are the units? 4.Determine concentration of the diluted unknown. 5. determine the undiluted concentration of the u ...continues

Chemistry Questions

1. Write orbital diagrams for the following elements: 26Fe 34Se 36Kr 6. Draw Lewis structures and structural formulas for the following molecules: H2O CO2 SO2 7. Label each bond in the molecules in problem #6 polar or nonpolar. 8. Give the shape of each molecule in problem #6 and describe whether each molecule is pola ...continues

Answer the following set of questions regarding the redox equation listed

1. Answer the following set of questions regarding the redox equation listed below: KMnO4 + Na2SO3 + H2O → MnO2 + Na2SO4 + KOH The oxidation # of sulfur in Na2SO3 is: The oxidation # of sulfur in Na2SO4 is: The change in the oxidation number of sulfur is: The oxidation # of manganese in KMnO4 is: The oxidation # of ...continues

BALANCE THE FOLLOWING EQUATIONS:

2. BALANCE THE FOLLOWING EQUATIONS: Ba(OH)2 + H3PO4 → Ba3(PO4)2 + H2O CaCO3 + HCl → CaCl2 + CO2 + H2O N2 + O2 + H2 → HNO3 C8H10 + O2 → CO2 + H2O

Chemistry Help

1. How many grams of CO2 would be formed from 20 grams of C8H10 in the following (UNBALANCED) reaction? C8H10 + O2 --> CO2 + H2O 2. How many moles of CO2 would be formed from 40 grams of CaCO3 in the following (UNBALANCED) equation? CaCO3 + HCl --> CaCl2 + CO2 + H2O 3. A gas sample has an original volume of 700 ml when ...continues

Chemistry Help

1. Calculate the pH of the following solutions with the given [H+] or [OH-] and indicate whether it is an acid or base: a. [H+] = 0.0001 b. [OH-] = 0.01 c. [H+] = 0.000001 2. Calculate the molarity of the following solutions a. 40 grams of Na3PO4 dissolved to make 400 ml of solution b. 40 grams of C6H12O6 dissolved ...continues

Chemistry Help

1. Calculate the molarity of the following solutions from this acid-base titration data: a. If 250 ml of Ba(OH)2 of unknown concentration with a methyl red indicator present is titrated with [0.325 M] HNO3, the yellow solution turns red after 36.4 ml of the HNO3 is added. What is the molarity of the Ba(OH)2 solution? b. ...continues

Calculate Ke for the following (equilibrium concentrations given below substances)

1, Calculate Ke for the following (equilibrium concentrations given below substances) a) H2 (g) + Br2 (g) ↔ 2 HBr (g) + heat [0.513] [0.62] [0.346] b) N2O4 (g) + heat ↔ 2 NO2 (g) [0.0325] [0.022] c) NH4SH (g) ↔ NH3 (g) + H2S (g) + heat [0.027] [0.0234] [0.209] 2. For all three of the equili ...continues

Predict and explain why the entropy change for each of the following is negative, positive, or zero.

Predict and explain why the entropy change for each of the following is negative, positive, or zero. a. Ag + (aq) + Cl - (aq) -> AgCl (s) b. Evaporating a beaker of ethanol at room temperature. c. H2 + Br2 -> 2HBr(g) d. Cooling nitrogen from 80 C to 20 C. e. Compressing a mole of Oxygen gas from 22 L to ...continues

Predict whether the following reaction would proceed spontaneously as written at 298 K by calculating both Delta G and e for the reaction, given that [Co2+] =.15 M and [Fe2+]= 0.68 M. ( E1/2= -0.282 for Co2+ + 2e- -----> Co0)

Predict whether the following reaction would proceed spontaneously as written at 298 K by calculating both Delta G and e for the reaction, given that [Co2+] =.15 M and [Fe2+]= 0.68 M. ( E1/2= -0.282 for Co2+ + 2e- -----> Co0) Co0 + Fe2+ ---> Co2+ + Fe0 A current of 0.452 A is passed through an ele ...continues