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during a strenuous workout an athlete generates 2050.0 kJ of heat energy. What mass of water would have to evaporate from the athletes skin to dissipate this much heat?
note at 100 celsius the molar heat of vaporization of water is 40.67 kJ/mol at 25 celsius room temp the molar heat of vaporization if water is 44.0 kJ/mol
What is the molality of a solution consisting of 67.3 mL of benzene (C6H6; d=0.877 g/mL) in 227 mL of hexane (C6H14; d=0.660 g/mL)
What is the percent yield of a reaction in which 244 g phosphorus trichloride reacts with excess water to form 144 g HCl and aqueous phosphorus acid (H3PO3)?
We have a 100mL 0.2M AgNO3 solution and a 100mL 0.2M CH3COONa solution. Please describe how to prepare a 35 mL mixture solution containing 60mM AgNO3 and 140mM CH3COONa?
If 36.0 mL of 0.150 M HCl(aq) is needed to neutralize all the NH3(g) from a 2.25-g sample of organic material, calculate the mass percentage of nitrogen in the sample.
Hydrogen has an electronegativity value between boron and carbon and identical to phosphorus. With this in mind, rank the following bonds in order of polarity with 1 being the most polar and 5 being the least polar.
Ammonium nitrate is a common ingredient in fertilizers that can also be used to make explosives because it decomposes as follows
Consider an experimental run at 273 rm K where the initial number of moles (n_1) is actually 1.00 rm mol, and the final number of moles (n_2) is 2.00 rm mol.
They are tethered together and are at the same temperature and pressure. Which balloon has the greater number of gas particles? Which balloon has the greater mass? Which balloon has the greater density?
Calculate [H3O ], [ClO4-], and [OH-] in an aqueous solution that is 0.110 M in HClO4(aq) at 25 °C. is the solution acidic, basic, or neutral
sample of a gas at 25.0 oC and at a pressure of 3 atm, what will the pressure be if the temperature is raised to 50.0 oC?
A mixture of 6.0 mol of H2(g) and 3.0 mol of O2(g) is placed in a sealed evacuated container made of a perfect insulating material at 27 C. The mixture is ignited with a spark and it reacts to form liquid water. Find the temperature of the water.
Methane enters a heat exchanger at a volumetric flow rate of 120.0 m3/min, at a pressure of 1.013 bar and temperature of 5.0°C. At these conditions, the specific enthalpy of methane is -45.181 kJ/kg.
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