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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)
In this exercise it was also assumed that the calorimeter was a perfect insulator and that no heat was lost to the surroundings.
calculate the number of joules required to melt 43.6g of benzene at 5.5 degrees celsius?nbspthe heat of fusion for
Calculate the volume of 6 M NaOH required to react completely with the amount of methyl salicylate you used. How much of the 6 M NaOH that you used was in excess of the theoretical amount?
A pipette is used to add 32 mL of 0.2 M Pb(NO3)2 to a 261.0 mL solution of 0.3 M NaF. Determine the equilibrium concentration of Pb2+(aq) in the final solution. Ksp(PbF2)=3.6E-8.
A 25 ml sample of .30M sodium acetate is titrated with .3M HCl. What is the pH after addition of 12.5 ml of HCl. (Ka= 1.8e-5)
Predict whether the following compounds will undergo the benzoin condensation, faster, slower than benzaldehyde, or give no reaction
Synthetic polypeptides can assume an helical structure under appropriate conditions. Indicate whether polylysine and polyglutamate form an helix
55.0 mL of a 1.70 M solution is diluted to a volume of 278 mL. A 139 mL portion of that solution is diluted using 175 mL of water. What is the final concentration.
An aluminum engine block has a volume of 4.77 L and a mass of 12.88 kg .What is the density of the aluminum in grams per cubic centimeter?
From the plots of the boiling point versus the volume of distillate in the simple distillation experiments, what can you conclude
a student carefully did a titration to determine the mass of acetic acid in the vinegar sample. after 50 ml of naoh was
A situation with an industrial input of arsenic directly into the lake at 10kg/Day. The lake volume is 1.2 x 10^8 m^3, and the average depth is 10m.
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