Te heat of formation of al2o3s is change hf -1669kj mol a
The heat of formation of Al2O3(s) is change Hf= -1669kJ/ /mol. a.) Calculate the heat evolved when 3.47 g of Al burns in oxygen. b.) Find the mass in grams of Al that burns when 1039 kJ are evolved.
Expected delivery within 24 Hours
Explain two of the above techniques briefly with diagrams. What is Routing Loops?
Annual maintenance cost for a particular section of highway pavement are $2000. The placement of a new surface would reduce the annual maintenance cost to $500 per year for the first 5 years and to $1000 per year for the next 5 years.
An airplane is traveling parallel to the ground in a region where the Earth%u2019s magnetic field is oriented perpendicular to the ground. What is the resulting voltage difference between the ends of each wing
After adding the two portions of water into your calorimeter setup and following the procedure outlined in the experiment, you determine the temperature of the mixed portions of water to be 45 oC. What is the heat capacity of the calorimeter. Assu
(1) To provide $750000 for th construction and $250000 for the initial equipment of a small engineering laboratory ; (2) to pay the $150000 per year laboratory operating cost; and (3) to pay for $100000 of replacement equipment every 4 years, b
How is HCl a base if it has no OH ions in is formula to omit when dissolved? Where does it's O come from
What are the difference between gas chromatography, column chromatography, and thin layer chromatography
For the reaction,: Ca(OH)2(s)+ CO2(g)= CaCO3(s)+ H2O(g) (a) Use the following standard enthalpies of formation to calculate the enthalpy change.
1932949
Questions Asked
3,689
Active Tutors
1451954
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
Identify one key relationship you have currently in your life (My mom, and we have a great relationships). What is that person and how would you describe that
According to Freud's Psychosexual Development, which stage are Jeffrey's symptoms consistent with?
Question: George's behavior may be less about the specific substance and more about replacing a deeply ingrained ritual.
1. Explain the controversy that surrounds personality and paraphilic disorder. 2. Explain your professional beliefs about this disorder, supporting
Take on the perspective of someone engaged in recruitment for human trafficking (such as a trafficker, pimp, or recruiter).
Some factors that contribute to a child being accepted or rejected by their peers can be their communication skills such as how the listen and respond to peers.
Question: You may not have alignment between your personal purpose and the corporate purpose in every job.