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A solution containting 1.45g of an unknown substance in 26.5g of succinonitrile was found to freeze at 34.4 degrees celcius. what is the molar mass of the unknown substance.
If 38.6 grams of hydrogen sulfide gas (H2S; MM = 34.08 g/mol) react with 36.3 grams of oxygen gas (O2, MM = 32.00 g/mol), what is the mass of sulfur dioxide (SO2, MM = 64.06 g/mol) gas produced
Calculate delta H of this reaction. Assume that the total volume is the sum of the individual volumes and the density and specific heat capacity of the solution are the same as for pure water. d for water=1.00g/mL; c for water=4.184 J/g degrees Ce..
for the reaction 2CH3CH2CH2CH3(g) + 13O2 --> 9CO2(g) +10H2O(g) delta h = -5285.0 kJ. a) how many kilojoules are released when 27.86 g of butane are burne? Assume that an excess of oxygen is present.
How many milliliters of .02 M HCl are used to completely neutralize 20.0mL of .01 M NaOH solution?
Choose the correct answer of the following, explain why it is true, and explain why the other choices are untrue: (A) high pE is associated with species such as CH4, NH4+
how many milimeters of 0.755 M H2SO4 solution is needed to react with 55.0 mL of 2.50 M KOH solution? Given 2KOH (aq) + H2SO4 (aq) ------ 2H2O (I) + K2SO4
What is the value of work (w) when a piston of volume 0.2 L expands against an external pressure of 200 kPa to a volume of 3.4 L?
The radius of a tungsten atom is 137 pm. How many tungsten atoms would have to be laid side by side to span a distance of 3.90 mm
A student substitutes his unknown for the NaBrO3. The dichloroethene layer turns dark orange. Which ions could be ruled out and what test should be performed next?
Many common weak bases are derivatives of NH3, where one or more of the hydrogen atoms have been replaced by another substituent.
how many moles of glucose, C6H12O6 can be burned when 60.0 mol of O2 is available?
The heat combustion of ch4 is 890.4 the heat capacity of h20 is 75.2. find the volume of methane measured at 298k and .690atm reauired to convert
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