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Calculate the enthalpy change (in kJ) associated with the conversion of 25.0 grams of ice at -4.00°C to water vapor at 106.0°C. The specific heats of ice, water, and steam are 2.09 J/g-K, 4.18 J/g-K, and 1.84 J/g-K, respectively. For H2O, ?Hfus = 6.01 kJ/mol and ?Hvap = 40.67 kJ/mol.
The vapor pressure of water at 26 degrees C is 25.209 mmHg. How many moles of gas were collected?
What is the pH of a 0.16M solution of a lactic acid. HC3H5O3
Calculate Ka for acetic acid in both the molal and molar standard states. Use as many sig figs as your calculations in part b.) warrant.
If you want to feed everyone, but still have equal numbers of buns and hot dogs, what is the minimum number of packages of buns and hot dogs you need, respectively?
At 27.7mL sample CO2(g) was collected over water at 25.0 degrees celsius and 1.00 atm. What is the pressure in torr due to CO2(g)?
A foundry worker throws a hot, freshly cast piece of iron into 10 liters (10 kg) of water to cool off. The initial temperature of the water is 25 degree celcius and the initial temperature of the iron is 100 degree celsius.
A sample of nitrogen gas in a 4.6-L container at a temperature of 30.°C exerts a pressure of 3.9 atm. Calculate the number of moles of gas in the sample.
Hardness in groundwater is due to the presence of metal ions, primarily Mg2 and Ca2 . Hardness is generally reported as ppm CaCO3 or mmol/L Ca2
Important information about Conceptual Organic chemistry and What chemical tests might be used to distinguish between pentanal and 2- pentanone; between benzyl alcohol and diphenylmethanol?
Electrolysis - Aluminium extraction, a. Aluminium is extracted from its ore by an electrolytic process. One extraction plant uses an applied e.m.f. of 5 V, and a current of 225 000 A. One tonne of aluminium is extracted after 14 hours.
compute the energy levels for the rotation perpendicular to its symmetry axis at J=1. T he bond length in the 14NH 3 =101.2 pm and NHN bond angle 106
Two objects at different temperatures are placed in a perfectly insulated calorimeter. When the system reaches equilibrium, which of the following statements is true?
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