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When fully inflated, a hot-air balloon has a volume of 1.6 x 10^5 at an average temperature of 397K and 0.985 atm.Assuming that air has an average molar mass of 29g/mol , what is the density of the air in the hot-air balloon and is it less dense or more dense with the density of air at STP?
What is the relationship between the standard cell potentials, E, for the following two galvanic cell reactions?
Write the net ionic equation for the reaction that occurs when an aqueous solution of hydrochloric acid reacts with an aqueous solution of ammonia. please find delta H also. Or at least give me the state at which each element is in.
how much heat is released when 105 g of steam at 100 co is cooled to ice at -15co? the enthalpy of vaporization of
what concentration of oxygen would be needed to maintain equilibrium in a system where NO and NO2 are known to be at equal concentrations
what is the partial pressure of helium? If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of argon?
Twenty-five mL of 0.150 M hydrofluoric acid, HF, is titrated with 0.100 M potassium hydroxide. What is the pH of the acid initially (before any base is added)?
The oxidation half and the reduction half of a voltaic cell are made of the same electrodes and the same electrolyte. The concentration of electrolyte is different in each compartment.
an ice cube of 15.1 grams is placed into 304 grams of h2o. compute the change in temperature in the h2o upon completing
Calculate the change in copper entropy associated with cooling one mole of copper over the following two ranges. Use the full form of Cp (if Cp is needed).
The mass percent of sulfur in the product is Blank 1 % (2 dec places). The mass percent of oxygen in the product is Blank 2 % (2 dec places).
an unknown liquid with boiling range of 179-181 C is insoluble in water, gives a blue green suspension with chromic acid and immediately forms a separate layer when shaken with Lucas' reagent.
what is the minimum rate that fresh air has to be supplied to the room so that the concentration of CO2 in the room doesn't exceed 0.500% by mole? Assume the room is well mixed, and the volume of the solid dry ice does not change.
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