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Calculating the Heat of Reaction from Heats of formation Use the following information to find ^Hf of methanol [CH3OH(l)]. CH3OH(l) + 3/2 O2(g) CO2(g) + 2 H2O(g) (heat)H°comb = -638.5 (heat)H°f of CO2(g) = -393.5 kJ/mol (heat)H°f of H2O(g) = -241.8 kJ/mol
A 2.770 g sample of a compound containing only carbon, hydrogen, and oxygen burns in excess oxygen to produce 4.06 g of CO2 and 1.66 g of H2O. Calculate the mass (in g) of C in the sample.
A volume of 60.0 mL of aqueous potassium hydroxide(KOH)was titrated against a standard solution of sulfuric acid(H2SO4). What was the molarity of the KOH solution if 24.7 mL of 1.50M H2SO4 was needed? The equation is: 2KOH(aq)+H2SO4(aq)-->K2SO4(aq..
Describe why this is based on the wavelength range that is transmitted. What color would you see if you mixed the two solutions with ?max = 520 and ?max = 610?
what is the value of Kc for the following reaction at equilibrium: N2(g) + 3H2(g) 2NH3(g) if [NH3]=2.2 M, [N2]=.44 M, and [H2]=.40 M
Explain the effect of that mistake on the calculated molarity MB. (Will the experimental MB calculated by Student A be higher or lower than the true MB value?)
The concentration of ordinary bleach is 6% w/v. How many grams of NaOCl are there in 1.00 gallon of bleach?
The following gas phase reaction is second order. 2C2H4(g)--->C4H8(g) Its half life is 1.51 min when [C2H4] is 0.250 M. a.What is k for the reaction?
A newly isolated protein was found to contain 0.493% histidine upon amino acid analysis. What is the minimum molecular weight for the protein (assuming only one His residue per protein molecule)
Liquid benzene, C6H6, (density = 0.877 g/mL) can be used as a fuel. What is ?H in kJ for the combustion of 2.86 L of benzene producing CO2(g) and H2O. Assume that the heat of combustion of benzene is -4.18 x 103 kJ/mol.
If a container having a volume of 322mL at 25.o degrees celcius was to suddenly reduce to 75.0mL, what would be the new temp.(n,p constant)?
describe and explain the possible effects on your results of the following experimental errors or variations.
A buffer is made by combining 3.50 L of 0.200M butylamine, C4H9NH2 with 7.50L of 0.100M butylammonium chloride, C4H9NH3Cl. Assuming that volumes are additive
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