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Calculate Enthalpy of HNCO given that the enthalpy of the following reaction is -221.4 KJ/mol :
NH3(g) + HNCO(g) -> HN2CO
The great escape puzzle. Capture the ions and put them back into their jars. There are 8 jars. Label each jar with the formula of the compound containing the captured ions.
What are the molality and mole fraction of solute in a 36.3 percent by mass aqueous solution of formic acid (CH3OH)?
A mechanic in an automotive repair shop is exposed to the following carbon monoxide levels over an 8 hour shift.
which type of bond has one pair of electrons shared between atoms? a) single covalent b) coordinate covalent c) double covalent d) metallic
Design a qualitative analysis scheme
What is the half-life of a compound if 89 percent of a given sample of the compound decomposes in 56 min? Assume first-order kinetics.
If iron is oxidized to Fe2+ by a copper(II) sulfate solution, and 0.289 grams of iron and 21.0 mL of 0.433M copper(II) sulfate react to form as much product as possible.
A 4.30 g nugget of pure gold absorbed 293 J of heat. The initial temperature was 29.0°C. What was the final temperature?
Ethylene glycol, C2H4(OH)2, is the main component of antifreeze. What mass percentage of ethylene glycol in water must be used to reduce the freezing point of the mixture to -9.34 deg-C? (K_fp for water is -1.86 deg-C/m).
If the reaction is allowed to proceed until all substances have reached their equilibrium concentrations, determine delta G for the reaction.
Calculate the equivalent number of moles of potassium permanganate? 3) calculate the clarity of the potassium permanganate solution?
A 155 g sample of an unknown substance was heated from 25.0°C to 40.0°C. In the process, the substance absorbed 5696 J of energy. What is the specific heat of the substance?
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