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Compute the heat absorbed when 46.0 g of ice at-10.0 C is converted to liquid water at 85.0 C. The specific heat of ice is 2.03 j/g c, define the molar heat of fusion of ice is 6010 j/mol as well as the specific heat of water is 4.18 j/g c.
A small hot air balloon is filled with 1.02 x 10^6 L of air (d=1.20 g/L). As the air in the balloon is heated, it expands to 1.13 x 10^6 L. What is the density of the heated air in the balloon
2.3 grams of sodium reacts violently with excess water and 0.080 grams of hydrogen are collected. What are the theoretical and percent yields of hydrogen gas
Calculate the energy in kJ required to convert 2.11 mol of sodium metal at 25 degrees celsius to 2.11 mol of gaseous Na+ ions. (Ionization energy of Na (g) is 495.9 kJ/mol.
The rate constant for a first-order reaction is 5.50 x 10-4 s-1 at 39oC and 2.32 x 10-3 s-1 at 56oC. What is the activation energy
Calculate the energy that must be transferred as heat to a van der Waals gas that expands reversibly and isothermally from Vi to Vf.
A nonmetal oxide dissolves in water to give an acid. Show this for gaseous carbon dioxide by writing a balanced chemical equation. (b) A metal oxide dissolves in water to give a base. Show this for solid potassium oxide by writing a balanced chemi..
What is the percent by mass of NaHCO3 in a solution containing 50 g of NaHCO3 dissolved in 400 mL of H2O?
The combustion of one mole of ethanol (C2H5OH(l)) to produce carbon dioxide and gaseous water has ?Hr = -1235 kJ · mol-1 at 298 K. What is the change in internal energy for this reaction?
A catalyst lowers the activation energy of a reaction from 215 kJ to 206 kJ. By what factor would you expect the reaction-rate constant to increase at 25*C? Assume that the frequency factors
the average human body contains 6.50 l of blood with a fe2 concentration of 1.60times10-5 m. if a person ingests 7.00
how many miligrams of concentrated sulfuric acid (H2SO4) [having the strength is 18 M], are required to prepare 750 ml of 3.0 M
how many NB molecules could you make by screwing one nut onto each bolt? show a balanced chemical equation and show all calculations for full credit
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