The following reaction can occur at 298K under
appropriate conditions.
2SO2(g) +O2(g)-----> 2SO3(g)
An equilibrium mixture contain O2(g) and SO3(g) at partial pressure
of 0.50atm and 2.0atm respectively. Using data available in
Appendix 4 of your textbook, determine the equilibrium partial
pressure of SO2 in the mixture. Will this reaction be most favored
at a high or at a low temperature, assuming standard conditions?
Justify your reasoning
Substance.
delta
H°
S°
SO2(g)
-297.
248
SO3(g)
-396.
257
O2(g)
0.
205
In: Chemistry
12. What is the molarity of 0.31 mol of NaCl in enough water to make 2.0 L of solution?
13. What is the molarity of the nitrate ions when 0.60 mol of barium nitrate, Ba(NO3)2, is dissolved in enough water to make 2.0 L of solution?
14. Calculate the molarity of calcium hydroxide that has been prepared by dissolving 2.24 g of calcium hydroxide in water and diluting the solution to a final volume of 4.00 L.
15. Calculate the molarity of the hydroxide ions in a solution that has been prepared by dissolving 70.3 g of barium hydroxide (Ba(OH)2) in water and diluting the solution to a final volume of 4.00 L. (M.W's: Ba 137.3 g/mol., O 16.0 g/mol, and H 1.0 g/mol)
16. How many moles of H+ are in 181 mL of 0.71 M nitric acid, HNO3?
In: Chemistry
23. Nitrobenzene (NB) is made by nitrating benzene (B) with a mixed acid (39% HNO3, 53% H2SO4, 8% H2O). The reaction is:
C6H6 + HNO3 ? C6H5NO2 + H2O
Conversion of B to NB is 97% complete
1000 lbm of B and 2070 lbm of acid used
How much xs HNO3was used?
How much NB is formed?
In: Chemistry
Glycogen is reducing or non-reducing ? If can explain the reason too ? It is a Biochemistry related question.
In: Chemistry
Outline the steps to calculate the initial pH in the titration of a strong acid with a strong base?
Outline the steps to calculate the pH before the equivalence point of the titration of a strong acid with a strong base?
Outline the steps to calculate the pH after the equivalence point of the titration of a strong acid with a strong base?
What is the pH halfway to the equivalence point of the titration of a weak base with a strong acid?
In: Chemistry
1) You are given a solid hydrate. You dry and weigh a sample
tube. You put in the hydrate and reweigh.
You heat the tube and contents to drive off any water then cool and
reweigh.
You obtain the following fictional data:
| Mass of sample tube and hydrate | 37.9143 g |
| Mass of sample tube and hydrate after heating and cooling | 36.8824 g |
| Mass of empty sample tube | 35.6254 g |
| Molecular weight of the anhydrous salt | 112.0 g/mol |
Calculate:
| Mass of hydrate weighed out | _______________ g | (a) |
| Mass of water lost after heating | _______________ g | (b) |
| Per cent water in the hydrate | _______________ % | (c) |
| Moles of water lost during heating | _______________ mol | (d) |
| Moles of anhydrous salt remaining after heating | _______________ mol | (e) |
| Ratio-moles of water per mole of anhydrous salt | _______________ | (f) |
Report this ratio (f) as a single number to two decimal places, e.g. the ratio of 2.00 mole water and 1.50 mol salt is 1.33
In: Chemistry
Calculate the amount of ATP in kg that is turned over by a resting human every 24 hours. Assume that a typical human contains ~50g of ATP (Mr 505) and consumes ~8000 kJ of energy in food each day. The energy stored in the terminal anhydride bond of ATP under standard conditions is 30.6 kJmol-1. Assume also that the dietary energy is channeled through ATP with an energy transfer efficiency of ~50%.
In: Chemistry
Consider a gas phase reaction, 2A+B −↽−⇀− 3C+2D. When 1.00 mol A and 2.00 mol B, and 1.00 mol D were mixed and allowed to come to equilibrium at 25◦ C and ptotal = 1.0 bar, the resulting mixture contained 0.90 mol C. Calculate (a)partial pressures of each at equilibrium, (b) Keq, and (c) ∆rG.
In: Chemistry
two solutions can be found on either side of a semi-permeable membrane. a 4.0m sucrose solution is found on the left side and a 2.0m Nacl solution is found on the right side. which direction will the solvent flow?
Also what would happen if it was 2.0m nacl on left and 4.0m sucrose on right ? what if it was 2.0nacl and 2.0m sucrose ?
please explain thanks
In: Chemistry
Plastic cup C
Mass of cup, water, and stirrer: 57.24g
Mass of sodium bicarbonate: 2.02g
Mass of citric acid: .76g
Total mass: 60.02g
Mass of cup, the solution, and stirrer after reaction: 59.53g
Difference: 0.49g
H3C6H5O7(aq) + 3NaHCO3(aq) --->Na3C6H5O7(aq) + 3H2O(l) + 3CO2(g)
1)Determine which reactant is the limiting reactant in the plastic up C. Describe your reasoning
2) Calculate the theoretical yield of carbon dioxide in plastic cup C
3) Calculate the percentage yield in plastic cup C
In: Chemistry
You have a solution that is 0.25M Ca2+ and .18M Ag+. You begin to add CO32- (carbonate ion) to form CaCO3 , and Ag2CO3. Which will precipitate first? Second?
What is the concentration of the first ion at the point when the second begins to precipitate?
What percentage of the first ion has been removed?
There three questions here.
In: Chemistry
In: Chemistry
You determined the theoretical yield if 0.5 moles of zinc is used to form ZnI2. Determine the percent yield if 515.6 g of product is recovered.
___ Zn + __I2 → ___ZnI2
In: Chemistry