What is the [OH-] of a solution which is 0.18 M in ammonium ion and 0.10 M in ammonia?

The answer should be 1.0 x 10^-3. Please show al the work. Thanks!

when 1.0 mol of NO(g) forms from its elements, 90.29 kJ of heat is absorbed. How much heat is evolved when 5.40 g of NO decomposes to its elements?

What volumes (in mL) of 1.0 M triethanolamine and 1.0M HNO3 is required to prepare 1.0L of pH 7.76 buffer using triethanolamine that is 0.020 M in both triethanolamine and triethanolammonium ion?

The binding energy of an electron in the ground state in a hydrogen atom is about:

A. 13.6 eV

B. 3.4 eV

C. 10.2 eV

D. 1.0 eV

E. 27.2 eV

For your final exam in electronics, you're asked to build an LC circuit that oscillates at 15kHz . In addition, the maximum current must be 0.15A and the maximum energy stored in the capacitor must be 1.0

The figure shows a 100-kg block being released from rest from a height of 1.0 m. It then takes it 0.90 s to reach the floor. What is the mass of the other block? The pulley has no appreciable mass or friction.

V. Buffer Solution from Strong Base and Weak Acid Measure out 30.0 mL of 1.0 M CH3COOH and 5.0 mL of 1.0 M NaOH into a beaker.

1. Calculate the total volume. (include units) Vol _________

2. What is the concentration of acetic acid in this solution after mixing. (include units) [CH3COOH] _______

3. What is the concentration of sodium hydroxide in this solution after mixing. (include units) [NaOH] __________

4. Calculate the expected pH of this buffer solution. pH _________

_ 5. Measured pH of this buffer solution. pH ___3.77_______

6. What is the percent error between the calculated and measured value? What are some of the possible sources of this error? % error________

Consider historical data showing that the average annual rate of return on the S&P 500 portfolio over the past 85 years has averaged roughly 8% more than the Treasury bill return and that the S&P 500 standard deviation has been about 34% per year. Assume these values are representative of investors' expectations for future performance and that the current T-bill rate is 5%.

Calculate the utility levels of each portfolio for an investor with A = 3. Assume the utility function is U = E(r) − 0.5 × Aσ².

1. a) How do bond analysts use bootstrapping?

b) Calculate the missing spot rates for the following Treasury yields. (All yields are shown on a bond equivalent basis). All the securities maturing from 1.5 years on are selling at par. The 0.5 and 1.0-year securities are zero-coupon instruments.

The constituents of a media for growing Hydrogenovibrio crunogenus are listed below.

     CONSTITUENTS                                                      ____                         AMOUNTS

      Sodium bicarbonate (NaHCO₃)                                                       5.0 grams

      Ammonium phosphate, monobasic [NH₄H₂PO₄]               1.0 gram

      Sodium chloride [NaCl]                                        5.0 grams

      Magnesium sulfate [MgSO₄ . 7H₂O]                            0.2 gram

      Potassium phosphate, dibasic [K₂HPO₄]                                  1.0 gram

      Iron III carbonate [Fe₂(CO_­3)₃]                                                          5.0 grams        

      Water [H₂O]                                                                                       982.8 grams                            

1. What type of microorganism is Hydrogenovibrio crunogenus based on the ingredients of this media-photoheterotroph, chemoautotroph,    chemoheterotroph, or photoautotroph?

2. What are the sources of nitrogen and phosphorus in this media?

3. Is the media chemically-defined or complex?

4. Is the media a liquid or semi-solid?