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Steam from a boiling teapot (100 °C) hits a person's hand and causes a burn. Assuming 1 g of water vapor condenses to liquid (at 100 °C) and then cools to 40 °C when it hits the hand, what fraction of the total heat delivered to the person's skin comes from the condensation process? The heat of vaporization of water is +40.7 kJ/mol, the heat capacity of liquid water is 4.184 J °C-1g-1
Determine what would be the concentration of the final solution If you take a ten mili litres portion of the stock solution and dilute it to a total volume of 0.250 Litres,?
The reaction is first-order in H2 and second-order in NO at a particular temperature. What is the rate law
What is the molarity of the solution if 310 of the solution reacts with magnesium to produce 7.40 of gas measured at STP?
Ammonia(NH3) chemically reacts with oxygen gas (O2) to produce nitric oxide (NO)and water. What mass of ammonia is consumed by the reaction of 1.50g of oxygen gas
Keq is 1.60 at 933 K for this reaction. H2(g) + CO2(g) H2O(g) + CO(g) Calculate the equilibrium concentration of hydrogen when [CO2] = 0.290 mol/L, [H2O] = 0.250 mol/L, and [CO] = 0.210 mol/L.
Draw a correct and complete arrow pushing mechanism for the reaction of aspirin and sodium bicarbonate to form sodium acetylsalicylate.
the water pressure compressed the balloon and reduced its volume. When the pressure had increased to 55.0 atm, what was the volume of the sample? Assume that the temperature was held constant.
the total volume of the gas bags of the german dirigible hindenberg, was 2.0 * 10^5m^3. how many grams of H2 would be required to fill them at 20 celcius and 1.00 atm pressure? hint convert m^3>cm^3>mL>L.
3.00×10-3 mol of HBr is dissolved in water to make 17.0 L of solution. What is the concentration of hydroxide ions, OH-, in this solution?
If equal amounts of Na2HPO4 and Na3PO4 are added in water, calculate the resulting pH. The pKa's of phosphoric acid are 2.1, 7.2, and 12.4
The normal boiling point of methane is -161.5 C. The specific heats of liquid and gaseous methane are 3.48 and 2.22 J/g.K, respectively. What is the final temperature of methane once the system equilibriates?
26.0cm of a solution containinh 1.86g of X2CO3 in 250 reacted completely with 27.0cm of solution contain 3.65g of HCL per dm,calculate the molar mass of X2CO3 and relative atomic mass of X, and identify X.
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