Benzene as a saturated liquid at 5,000 mmHg is fed to a vaporizer. The product from the vaporizer is a superheat vapor at 165°C and 4,550 mmHg.
For a flow rate of 2,500 moles/min of benzene, how much is needed (kW)?
If steam is available at 500°C and 20 bar and condenses to a saturated liquid at 20 bars, how much steam (kg/hr) is needed to vaporize the benzene?
Know: ΔHv = 30.765 kJ/mol, Tb = 80.10°C, SG = 0.879, Cp (l) = 126.5 * 10^-3 + 23.4 * 10^-5 T (°C), Cp (v) = 74.06 * 10^-3 + 32.95 * 10^-5T - 25.20 * 10^-8 T^2 + 77.57*10^-12 T^3
In: Chemistry
For the following reaction, 9.88 grams of sulfur are allowed to react with 21.8 grams of carbon monoxide. sulfur (s) + carbon monoxide (g) sulfur dioxide (g) + carbon (s)
What is the maximum amount of sulfur dioxide that can be formed? (in grams)
What is the FORMULA for the limiting reagent?
What amount of the excess reagent remains after the reaction is complete? (in grams)
In: Chemistry
When 15.0 mL of a
4.89×10-4 M zinc
nitrate solution is combined with 12.0 mL
of a 6.25 ×10-4 M sodium
hydroxide solution does a precipitate
form? (yes or no)
For these conditions the Reaction Quotient, Q, is equal to
When 15.0 mL of a
7.41×10-4M potassium
carbonate solution is combined with 12.0
mL of a 4.85×10-4M copper(II)
nitrate solution does a precipitate form? (yes
or no)
For these conditions the Reaction Quotient, Q, is equal to
In: Chemistry
What do enzymes do and how do they do it (this question is intentionally vague and open ended)?
In: Chemistry
what effect does ligand exchange cause for cancer therapy?
preferably ruthenium complexes vs platinum complexes
In: Chemistry
l
2. Determine the mole fraction of zinc(II) sulfite in
a 4.22 M aqueous solution of zinc(II) sulfite. The density of the
solution is 1.01 g mL-1.
answer is not 0.0699
In: Chemistry
Formic acid (HCOOH) has Ka= 1.8x10-4. What is the pH of a 0.01 M solution of formic acid ?
PLEASE HELP I HAVE EXAM
In: Chemistry
Complete the following table
| Solution | [H3O+] | [OH-] | pOH | acidic, basic, neutral |
| Orange juice | ||||
| Milk |
1
a) Calculations for orange juice
pH= 4.5
b) calculation for milk
pH= 6.0
In: Chemistry
Explain why quantum numbers stop following the expected trend for elements at potassium, while they do follow the expected trend for ions.
In: Chemistry
Find the length and width of a square basin for virus disinfection of a flow of 5 MGD. You may assume a depth of 5 ft, a Cxt product of 20 (mg/L) min for 3-log removal, and a target free chlorine residual of 0.4 mg/L.
In: Chemistry
What is the initial pH of a titration of 25.0 mL of 0.126 M NH3 with 0.287 M HCl? Kb = 1.8 x 10-5 SHOW WORK
a. 11.18
b. 7.00
c. 2.82
d. 1.04
e. 0.54
In: Chemistry
1-Mention the uses of
acetanilide?
2-Why glacial acetic acid is used in preparation of
Acetanilide from aniline?
In: Chemistry
Discuss the relevance of of qualitative anaysis for metals in water (i.e. metals in aqeous soultions). For example, what is the usefullness of qualitative anaylysis and what use could such analyses of metal cations (or any other species) have that relates to our lives?
In: Chemistry
As with any combustion reaction, the products of combusting a hydrocarbon fuel (CxHy) with oxygen (O2) are carbon dioxide (CO2) and water (H2O).
A mass of 16.89 g for an unknown fuel was combusted in a reaction vessel containing an unknown amount of oxygen. At the end of the reaction, there still remained 16.85 g of the fuel as well as 0.0654 g of water and 0.1198 g of carbon dioxide. The oxygen was completely consumed during the reaction.
How many molecules of oxygen gas were initially present in the reaction vessel?
Express the number of molecules to three significant digits
In: Chemistry
Use the method of successive approximations to determine the pH and concentrations of H2A, HA–, and A2– in a solution of 0.00273 M monopotassium fumarate (KHA). The pKa values for fumaric acid are 3.02 (pKa1) and 4.48 (pKa2).
In: Chemistry