Homework Help for Chemistry

Use the standard enthalpies of formation from Appendix II (A-7 toA-12) to calculate the enthalpy change (in kJ) for the reduction ofiron (III) oixde to iron at 298 K and 1 atm. (Calculate it for thereaction as written, namely 2 moles of iron (III) oxide and 3 molesof carbon.)

2Fe₂O₃(s) + 3C(s) --> 4Fe(s) +3CO₂(g)

In the reaction 2 A + 3 B ------> C +5 D, reactant A is found to disappear at the rate of 3.1 x 10^-4^ Ms^-1^. Calculate the rate of appearance for each of the othersubstances in the reaction ( and label them clearly).

steam tables can be found online.

Consider the following gas data and use the two supplied graphpapers to make a graphs of: volume vs. 1/pressure, which is alinear relationship. Use proper graphing techniques.

Pressure(torr) Volume(mL)

5.0 40.0

10.0 20.0

15.0 13.3

17.0 11.8

20.0 10.0

22.0 9.10

30.0 6.70

40.0 5.00

Need Help with both questions

A building consists of a 1.5 m x 1.5 m window on the wall facingthe wind and an opening of 1.5m x 1.0 m on the opposite window. Thecenter-to-centre distance between the windows in the verticaldirection is 2.5 m. The outdoor temperature is 313 K, while theindoor is maintained at 303 K. Calculate the airflow rate due tothe combined effect of wind and stack effects, if the wind blows ata speed of 25 kmph.

Solve the question 1 , please

Solve the question 1 , please

Solve the question 1 , please

On the planet Zog in the Andromeda galaxy, all of the stableelements have been studied. Data for some main-group elements areshown below (Zoggian units are unknown on Earth and, therefore,not shown). Limited communications with the Zoggians haveindicated that balloonium is a monatomic gas with two positivecharges in its nucleus.Use the data to deduce the names thatEarthlings give to these elements:

Name, AtomicRadius, IE1,EA1 (<-- order of databelow)

Balloonium, 10, 339, 0

Inertium, 24, 297, +4.1

Allotropium, 34, 143, -28.6

Brinium, 63, 70.9, -7.6

Canium, 47, 101, -15.3

Fertilium, 25, 200, 0

Liquidium, 38, 163, -46.4

Utilium, 48, 82.4, -6.1

Crimsonium, 72, 78.4, -2.9

I need to create a separation and purification scheme for theexperiment entitiled: "Natural Product by Extraction: Extraction ofTrimyristin." We are extracting trmyristin from nutmeg usingdiethyl ether and acetone. Our teacher prefers these schemes drawnlike flow charts if that is at all possible. Thank you so much!

Suppose a solution was too concentrated for an accurate readingwith the spectrophotometer. The concentrated solution was dilutedby placing 1.00 mL of the concentrated solution in 4.00 mL ofwater. The solution was then placed in the spectrophotometer and anabsorbance was obtained and after a few calculations the molarconcentration was calculated to be 3.5 � 10�6 M. what was theconcentraion of the original solution

Suppose a solution was too concentrated for an accurate readingwith the spectrophotometer. The concentrated solution was dilutedby placing 1.00 mL of the concentrated solution in 4.00 mL ofwater. The solution was then placed in the spectrophotometer and anabsorbance was obtained and after a few calculations the molarconcentration was calculated to be 3.5 � 10�6 M. what was theconcentraion of the original solution

A voltaic cell is constructed using electrodes based on thefollowing half reactions:

a) Which is the anode and which is the cathode in this cell?

b) What is the standard cell potential?

Consider rhe following REDOX reaction:

a) Write the oxidation and reduction half-cell treactions.

b) Sketch the cell, label the anode and cathode and thedirection in which the electrons are flowing.

c) Show this reaction in shorthand notation.