Consider the reaction, N2(g) + 3 H2(g) → 2 NH3(g). Suppose 56 g of N2(g) reacts with 18 g of H2(g).

d. What is the limiting reactant?

e. When the reaction is complete, how many grams of NH3(g) are produced?

f. When the reaction is complete, how many grams of N2(g) remain?

g. When the reaction is complete, how many grams of H2(g) remain?

h. If the reaction actually produced 55 g of NH3(g), what is the percent yield?

For the reaction Ti(s)+2F2(g)→TiF4(s) compute the theoretical yield of the product (in grams) for each of the following initial amounts of reactants. a)6.0 g Ti, 6.0 g F2 (express answer to two sig figs) b)2.3 g Ti, 1.4 g F2 (express answer to two sig figs) c)0.234 g Ti, 0.298 g F2 (express mass to three sig figs) Please show steps!

Which statements regarding combustion analysis to determine percent composition are not correct?
      I. The mass of oxygen in the sample compound can be determined from the mass of carbon dioxide that is produced.
      II. If a compound contains an element other than carbon and hydrogen, combustion analysis cannot be used to determine its empirical formula.
      III. Combustion analysis data alone is not sufficient to determine the molecular formula with certainty.
IV. If some CO is produced rather than all CO₂, then the empirical formula that is calculated will be too high in carbon.

For this assignment, the target compound that you should synthesize is benzyl methyl ether. This is a
substitution reaction. Examine the product and determine which bonds may be formed. Keep in mind the
substitution pattern of the product and the nature of the mechanism accommodated by this arrangement.

starting materials: benzyl chloride, ether, NaOMe

A. Approx TLC values of product and starting material

B. Write mechanism for this reaction

Calculate ?G?rxn and K for each of the following reactions.

Part A

The reaction of Cr2+(aq) with Cr2O2?7(aq) in acid solution to form Cr3+(aq).
Calculate ?G?rxn.

Part B

Calculate K.

Express your answer using two significant figures.

Part C

The reaction of Cr3+(aq) and Cr(s) to form Cr2+(aq). [The reduction potential of Cr2+(aq) to Cr(s) is -0.91 V.]
Calculate ?G?rxn.

Express your answer using two significant figures.

Part D

Calculate K.

Express your answer using one significant figure.

Carbon dioxide makes up approximately 0.04% of Earth's atmosphere. If you collect a 2.5 L sample from the atmosphere at sea level (1.00 atm) on a warm day (27 ∘C), how many CO2 molecules are in your sample?

Based

Calculate , using the equipartition theorem, the constant-volume heat capacity of CO_2 in three cases:

a.) no vibrations active (the low-T limit)

b.) all vibrations active (the high-T limit)

c.) with just the lowest-energy vibration active.

Imagine an isolated, 10-liter cylinder containing one mole of ideal gas held in the left five liters of the cylinder by a piston, initially locked in place. The right half of the cylinder is evacuated; the entire system is maintained at constant temperature. When the piston is freed to move frictionlessly, we could track the motion of the piston and the volume in 1-liter increments. Calculate the change in entropy (in J mol^-1 K^-1) of the gas upon expansion after each of the five 1-liter increments. Demonstrate that the total entropy is indeed maximized when the expansion is complete. Make a table.

define polymers and how are they synthesized

Classify each compound as an acid, salt, base, oxide, binary molecular, or organic.

AlF₃                                        9. CCl₄                                   17. NO₂        

HNO₃                                      10. H₂SO₄                             18. NH₄Cl

NaNO₃                                   11. CuCl₂                              19. C₃H₇OH

N₂O₂                                       12. NH₄ClO₃                         20. NH₃

Ca(OH)₂                                 13. Sn(OH)₄                         21. CH₃CH₂CH₂CH₃

CH₄                                         14. ClO₂                                22. H₂O

NH₄OH                                   15. Na₂O                              23. (NH₄)₂O

Fe₂O₃                                      16. SiO₂                                24. HC₂H₃O₂

A compound has carboxyl group, an aminium group, and a guanidinium group. The pKas of the groups are 3.6, 9.7, and 12.8, respectively. A biochemist has 100 mL of a 0.10 M solution of this compound at a pH of 9.2. She adds 37 mL of 0.1 M HCl. To the nearest hundredth of a unit, what will be the pH of the solution after addition of the HCl (assume full stirring to reach a new equilibrium)?

Describe the preparation of 1L of a 0.1 M phosphate buffer at pH 8.0. The pKa for the buffer is 6.86