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Use the following data to calculate the combined heat of hydration for the ions in sodium acetate (NaC2H3O2): Hlattice = 763 kJ/mol; Hsoln = 17.3 kJ/mol?
A. -746 kJ/molB. -780 kJ/molC. 746 kJ/molD. 780 kJ/mol
WHen 1.187g of a metallic oxide is reduced with excess hydrogen, 1.054g of the metal is produced. What is the metallic oxide
Hydrogen gas is collected at 29 c the total pressure of the system is 773 torr. If the vapor pressure of water at 29c is 30 torr what is the partial pressure of the hydrogen gas?
The recommended adult dose of Elixophyllin, is 6.0 mg/kg of body mass. calculate the dose in milligrams for a 120 lb person.
Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 9.70 MJ of energy (in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 °C
You need to dissolve CaCl2 in water to make a mixture that is 31.5% calcium chloride by mass. If the total mass of the mixture is 380.6 g, what masses of CaCl2 and water should be used
The activation energy for the following first-order reaction is 318 kJ/mol. N2O5(g)-->2NO2(g)+(1/2) O2(g). The value of the rate constant (k) is 6.65x10^-5 s^-1 at 84 degrees C. What is the value of k at 49 degrees C. (R=8.314 J/mol K)?
if 0.176 moles of mg have combined with 0.220 moles of o what is the empirical formula of the
Calculate the concentrations of all species in a 0.840 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid
If the activation energy to prepare a hard boiled egg is 286 KJ, determine how long it would take to prepare a " 3 minute egg " at the top of a mountain where the atmospheric pressure is only 578 torr.
a corrosion technologist pipetted a 100 ml hard water sample and titrated it with 37.64 ml of 0.01 M EDTA solution for a total endpoint, and 29.32 ml of 0.01 M EDTA solution for a calcium endpoint.
for the reaction 2a b --gt 2c if b is initially 4.0m and 2min later is 3.0m what is the rate of appearance of
A bicycle tire is filled with air to a pressure of 95.0 psi at a temperature of 19 degrees celcius. Riding the bike on asphalt on a hot day increases the temperature of the tire to 58 degrees celcius. The volume of the tire increases by 4.0%. What..
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