Calculate the change in enthalpy
Calculate the change in enthalpy when 52.0g of Cr at 25 degrees celsius and 1 atm pressure is oxidized.
(delta Hf (degrees) for Cr2O3(s) is -1140kJ/mol)
4Cr(s) + 3O2(g) -> 2Cr2O3(s)
A. -1140kJ
B. +1140kJ
C. -570kJ
D. +570kJ
E. -285kJ
Now Priced at $20 (50% Discount)
Recommended (98%)
Rated (4.3/5)
Write a balanced equation. Draw the reaction mechanism. Justify the species involved as nucleophiles, electrophiles, radicals, acids or bases.
A sample was placed on a chromatography column. Methylene Chloride was used as the eluting solvent. No seperation of the components in the sample was observed.
How many grams of silicon tetrafluoride (gas) at room temperature, would fill the same volume as that occupied by 440 grams of carbon dioxide at 290 degrees C and 900 torr?
Set up the differential equation to show the rate of change of pollutant concentration with time. Rearrange the equation and solve for outlet pollution concentration
The angles of depression from each hiker to the landmark meter are 37° and21°. How far apart are the hikers?
What will the new pressure be when the volume expands to 5.0L and 3.0 mol of helium gas is added while the temperature is constant?
How do you safely handle a hot crucible? Does the iron in FeC2O4*2H2O change oxidation number during the heating process? If so, what is the change?
Boyne Inc. had beginning inventory of $13,320 at cost and $22,200 at retail. Net purchases were $133,200 at cost and $188,700 at retail. Net markups were $11,100.
1932724
Questions Asked
3,689
Active Tutors
1436326
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
recommendation treatment plan for a 24 years old male with diagnosis of Generalized anxiety disorder, Major depressive disorder,
Question: Four factors should consider when evaluating the results of confirmation procedures?
Question: Unlike Sigmund Freud's psychoanalysis, Alfred Adler's individual psychology assumed that:
How does the Transtheoretical Model relate to your situation? Was there anything else discussed in class or in the materials that helped
Write about at least one CSWE core competency and accompanying practice behaviors that apply to the significant activity from your field placement.
It is common for people who do not understand play to assume children are just making a mess or doing things without purpose as they play.
Question: What are the four components of parts of a healthy relationship?