20.0mL of 0.127M diprotic acid (H2A) was titrated with 0.1018M KOH. The acid ionization constants for the acid are Ka1=5.2

Which one of the following alcohols will be soluble in water? Which one of the following alcohols will be soluble in water? 2-pentanol 2-butanol 3-hexanol 2-propanol

a.) What are the limitations of the ICP-MS?

b.) Which elements is it optimal for (generally)?

c.) Which elements will it not measure well?

A solution contains barium nitrate and lead (II) nitrate. What substance could be added to the solution to precipitate the lead (II) ions, but leave the barium ions in solution?

A) ammonium carbonate

B) no such substance exists

C) beryllium sulfate

D) silver nitrate

E) strontium bromide

Explain how the sulfur dioxide released in a coal-fired power plant in the U.S. can decrease the pH of a lake in Canada.

Describe how nitrogen oxides form HNO3 in the atmosphere.

For the diprotic weak acid H2A, Ka1 = 3.8 × 10-6 and Ka2 = 8.2 × 10-9. What is the pH of a 0.0750 M solution of H2A? What are the equilibrium concentrations of H2A and A2– in this solution?

1) pH

2) [H2A]

3) A^2-

Please explain all steps and equations, please...

A 0.07420 gram sample of methyl amine was mixed with 125.0 mL of a HCl solution. The back-titration of the unreacted acid required 5.35 mL of 0.1057 M KOH to reach the equivalence point. Determine the molarity of the acid.

Natural gas is primarily methane, CH₄, and is used to heat homes. A typical home is approximately 2000 ft² and the ceilings are 8 ft high. The following data may be helpful: The heat capacity of air is 1.01 J/g·K and the and the enthalpy of combustion of methane is -890.8 kJ/mol. Assume that the molecular weight of air is the same as nitrogen, its major component.

How many grams of methane are required to raise the temperature in the home from 39°F to 72°F?

How many grams of CO₂ does this reaction produce?

1. Structural steels have traditionally been used in shipbuilding; however, with

increasing fuel costs, it is desirable to find alternative lower weight materials.

Some of the key properties required for shipbuilding materials are high yield

strength, high corrosion resistance, and low cost. Discuss the benefits and

disadvantages of aluminum alloys as a replacement for structural steels in ships.

How many grams of NaCl are contained in 350. mL of a 0.152 M solution of sodium chloride?

A) 6.22 g

B) 8.9 g

C) 3.11 g

D) 53.2 g

E) none of these

Attribute melting temperature, lattice constant, and elastic properties to the corresponding features of the interatomic potential.

For the facility described in !!!, you have been notified by the U.S. Department of Homeland Security that your facility is a “covered” facility in a high risk tier. List and briefly explain the actions you need to take to fully comply with CFATS? Please note, a complete response to this question requires listing each of the rules you need to review and a brief explanation of how you determined the appropriate actions you must take to keep the facility in compliance. (approximately 100 words) cite your sources

!!!) You are the EH & S manager or Environmental Engineer for a facility that uses more than 500 different chemicals at your manufacturing plant. The Plant Manager has assigned you the responsibility of maintaining full compliance with all environmental, emergency planning/preparedness, and occupational safety and health requirements. Explain the first step in the process of determining the compliance requirements under CFATS for your facility.

a) How many grams of NH₃ can be produced from 4.75 mol of N₂ and excess H_2?

b) How many grams of H₂ are needed to produce 11.85 g of NH_3?

c) How many molecules (not moles) of NH₃ are produced from 7.98x10^-4 g of H_2?

d) What mass of HCl in grams is neutralized by a dose of milk of magnesia containing 3.55 g Mg(OH)_2?

How much 5 M KOH must be added to 1 L of 0.1M histidine at pH 6 to bring it's pH exactly to 6.5?

Explain why some alloys’ strength increases with aging then decreases again.