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Calculate the heat of formation of Magnesium oxide (MgO). Data given are: Mg(s) +2HCl (aq) ......> MgCl2 (aq) + H2 (g) ?H = 462 kJ/mol MgO(s) + 2HCl (aq) .......> MgCl2 (aq) + H2O (l) ?H = -146.0kJ/mol H2 (g) + 1/2O2 (g) .........> MgO (aq) ?H = -602kJ/mol What is ?H0f MgO? (The reaction below) Mg(s) +1/2 O2 (g) ............> MgO(s)
Mass: 7.30*10^4 kg Al(s) Mass: 6.10*10^5 kg Oxygen (reacts with hydrogen to form gaseous water) 10 Al(s) + 6 NH4ClO4(s) --> 4Al2O3(s) + 2 AlCl3(s) + 12 H2O(g) + 3 N2(g) Assuming Aluminum and Oxygen are limiting, determine total energy. Delta Hf of..
To find the pKa of X-281, you prepare a 0.075 M test solution of X-281. The pH of the solution is determined to be 3.00. What is the of X-281.
a mass of 0.120 g was dissolved in water and neutralized with 21.0 mL of NaOH. Calculate the molarity of NaOH.
a 145 g aluminum cylinder is removed from a liquid nitrogen bath where it has been cooled to -196deg c. the cylinder is
considering the given equation fe2o3 s 3 co g ? 2 fe s 3 co2 g this is the overall reaction for the production of
At 25 degrees celsius at 0.50 g sample of polyisobutylene (a polymer used in synthetic rubber) in 100.0 ml of benzene solution has an osmotic pressure that supports a 5.1mm column of solution (d = 0.88 g/mL). What is the molar mass of the polyisob..
Show the amounts in NIKE's accounting equation by calculating thevalue of NIKE's total assets, total liabilities and total shareholder's equity
The decomposition of SO3 to SO2 and O2 , 24 Kcal/mole of heat is absorbed by the system.
What is the approximate ratio of the molar concentrations of CO_2(aq) in the soda before it is opened to that in the soda after it has been opened and reached equilibrium with the surrounding atmosphere
Silicon has a FCC structure with unit cell edge of 5.43A and 4 atoms per init cell. a) how many silicon atoms are there in 1cm3 of material b) suppose you dope that 1 cm3 sample of silicon with 1ppm of phosphorus that will increase the conductivit..
When a 2.00 L flask containing 1.50 atm of gas A is joined with a 2.50 L flask containing 0.350 atm of gas B, and the stopcock between the flasks is opened, and the gases are allowed to mix thoroughly, the following reaction proceeds at constant t..
a. For a weak acid with a pKa of 6.0, show how you would calculate the ratio of acid to salt at pH 5. b. Suppose you have just added 100 mL of a solution containing 0.5 mol of acetic acid per liter to 400 mL of 0.5 M NaOH. What is the final pH?
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