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To treat a burn on your hand, you decide to place an ice cube on the burned skin. The mass of the ice cube is 12.9 g, and its initial temperature is -13.9 °C. The water resulting from the melted ice reaches the temperature of your skin, 30.2 °C. How much heat is absorbed by the ice cube and resulting water? Assume that all the water remains in your hand. Constants: Quantity per gram per mole Enthalpy of fusion 333.6 J/g 6010. J/mol Enthalpy of vaporization 2257 J/g 40660 J/mol Specific heat of solid H2O (ice) 2.087 J/(g·°C) * 37.60 J/(mol·°C) * Specific heat of liquid H2O (water) 4.184 J/(g·°C) * 75.37 J/(mol·°C) * Specific heat of gaseous H2O (steam) 2.000 J/(g·°C) * 36.03 J/(mol·°C) *
what is heat of vaporization of a liquid that has a vapor pressure of 606 torr at 84 degrees celsius and a boiling point of 96.3 degrees celsius at 1 atm?
where n increases from zero to fourteen over the series from Lanthanum to Lutetium Select the two ions that have 5 unpaired spins. which 2 would have it?
a 436 mL volume of hydrogen gas is collected at 25 kelvin and 725 torr. what volume will gas occupy at STP
A gas filled balloon with a volume of 12.5 L at 0.90 atm and 294 K is allowed to rise to the stratosphere where the temperature is 268 K and the pressure is 1.0 millibar. What is the final volume of the balloon ? (1.0 atm = 1.013 bar).
For each reaction, calculate the mass (in grams) of the product formed when 10.1g of the underlined reactant completely reacts. Assume that there is more than enough of the other reactant.
The total molarity of acid and conjugate base = 0.100M. A boy adds 4.20 milliliters of a 0.370 M solution to the beaker. Determine how much will the pH change?
Molecular weight and mole concept explained in this solution, The molecular weight of NaOH is 40. the molecular weight of a widely used buffer, HEPES, is 255
determine the empirical formula of a substance (Vanillin) that contains 63.15% carbon, 5.30% Hydrogen, and 31.55% oxygen.
Draw a Lewis Structure for C3O2. Draw a Lewis Structure for C2H3NO5
a 6.0-g sample of [Ni(H2O)6]Cl2 is dissolved in aqueous solution. If an excess of ethylenediamine (en) is added to the solution, solid [Ni(en)3]Cl2*2H2O forms. What is the theoretical yield of product from the reaction?
Typical rate of deposit of dust (dustfall) from unpolluted air was reported as 10 tons per square mile per month. Express this dustfall in milligrams per square meter per hour.
Calculate the mass in metric tons of a cube of Au that is 36.1cm on each side? It is given that density of gold- 19.3 g.cm 3 , (1 metric ton-100kg)
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