Hydrogen gas reacts with nitrogen gas to form ammonia according to the reaction below.

H2 (g) + N2 (g) → NH3 (g)

a. How many moles of NH3 are produced for every 1 mole of H2? Classify this reaction.

b. Suppose 12.2 g of H2 (g) reacts with 48.4 g of N2 (g). Identify the limiting reactant. What is the theoretical yield of the ammonia product in grams ? Show your work.

c. What mass (in grams) of the excess reagent is left over? Show your work.

d. If 55.0 g of ammonia is produced, what is the percent yield? Show your work.

Calculate the binding energy per nucleon (in J) for ²H and ³H. The atomic masses are 2.014102 u for ²H, and 3.016049 u for ³H. (Enter unrounded values. Assume that the mass of ¹₁H = 1.007825 u,m_p = 1.007275 u, m_n = 1.008666 u, and m_e = 0.000549 u, respectively.)

7. Nitric acid (NO) reacts with oxygen gas to form nitrogen dioxide (NO₂), a dark brown gas:
   
   2NO(g) + O₂(g) → 2NO₂(g)
   
   In one experiment 0.886 mole of NO is mixed with 0.503 mol of O₂.
   1. Calculate which of the two reactants is the limiting reagent. (5 points)
   2. Calculate also the number of moles of NO₂ produced. (5 points)

What reactant is left over and how much of it is left over?

Solubility products for AgCl and AgI are:

Ksp(AgCl) = 1.82*10^-10

Ksp(AgI) = 8.31*10^-17

0.010 moles of AgCl is added to 100 mL of water, then 0.020 moles of NaI is added. What are the concentrations of Cl and Ions at equilibrium?

What polymer properties can be obtained from Thermograms (DSC, TGA, DTA....)?? LIST AT LEAST 5 Properties and show them on the graph

urgent need

HF(aq) is a weak acid with pKs = 3.17.

In a solution of HF(aq) the following equilibrium sets:

HF(aq)+F^- (aq) = HF₂^-(aq) K = 5.1

Calculate [F^-(aq)], [HF(aq)] and [HF₂^-(aq)] in a 0.10 M HF(aq) solution, where pH = 3.2

I really need help with this one?

Experimental Studies of Reaction Rates

Name two molecular processes and the timescales of these processes.

A water sample contains 1.00*10^-4 mass% silver nitrate. Silver chloride's solubility product is K_sp(AgCl) = 1.82*10^-10

a) How much volume of 1,000 M sodium chloride solution must be added to 1.00 L of the solution in order for 90.0% of the silver to precipitate as silver chloride?

b) What is the mass of the precipitated silver chloride?

Calculate the solubility of silver chloride in a solution that is 0.200 M in NH3.

In a direct formic acid fuel cell, formic acid (HCOOH) is oxidised into carbon dioxide and water over an alloy nanoparticle catalyst. The standard reduction potential for O2 is +1.23 V and for the reduction of CO2 to HCOOH is -0.25 V. (a) Write down balanced equations for each half-cell reaction and the overall cell reaction. Calculate the standard potential of the cell. (b) Under operating conditions, the concentration of HCOOH is 5.0 mol dm-3, and the pressures of O2 and CO2 are 3.4 and 1.9 bar respectively. Assuming ideal behaviour, calculate the operating voltage of the cell at 298 K. (c) If the entropy change for the reaction is +34.2 J K-1 mol-1, calculate the operating voltage of the cell at 353 K. Comment on the implications of your answers for the chosen operating conditions.

The U.S. quarter has a mass of 5.67 g and is approximately 1.55 mm thick.

A) How many quarters would have to be stacked to reach 575 ft , the height of the Washington Monument?

B) How much would this stack weigh?

C) How much money would this stack contain?

D) The US National Debt Clock showed the outstanding public debt to be $11,687,233,914,811.11 on August 29, 2009. How many stacks like the one described would be necessary to pay off this debt?

The pH of a solution was found by measuring the emf of a cell composed of a standard silver electrode and a hydrogen electrode of unknown hydrogen ion concentration. If the emf was 1.01v when the pressure of hydrogen was 1.00atm, what was the pH at 25^oC?

In organic chemistry, how does small molecule synthesis and reaction compare to biological functions and actions by various biochemistries? Is there a relationship that we should be aware of? How do small molecule affect biological process and how do biological process and molecules effect small molecule reactions?

1. Write the (a) balanced equation for the formation of liquid water from hydrogen and oxygen gas, and use it to explain the following terms: (b) chemical reaction, (c) reactant, (d) product.

2. Balance the following equations:

   1. C + O2 → CO

   2. CO + O2 → CO2

   3. Na + H2O → H2 + NaOH

   4. Zn + HCl → ZnCl2 + H2

   5. NaOH + H2SO4 → H2O + Na2SO4

   6. NH3 + CuO → Cu + N2 + H2O

3. Calculate the mass in grams of iodine (I2) that will react completely with 20.4 g of aluminum (Al) to form aluminum iodide (AlI3).

4. The annual production of sulfur dioxide from burning coal and fossil fuels, auto exhaust, and other sources is about 26 million tons. The equation for the reaction is
   
   S(s) + O2(g) → SO2(g)
   
   How much sulfur (in tons), present in the original materials, would result in that quantity of SO2?