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Explain the gas inside a flexible container e.g., a balloon is allowed to expand against a constant external pressure of 1.1 bar until the volume enlarge from 2.6 L to 8.6 L. Compute the amount of work done on the system
considering the molecule hooh. what happens to the overlap in the sigma bond between the 2 o atoms as one hydroxyl
to obtain the same antifreeze protection requires 76 of propylene glycol to replace each 62 of ethylene glycol.
Using a PH meter; the PH of cranberry juice cocktail was found to be 2046 which indicate that the [H3O+]=3047 x10^-3 M. Titration of a 1.0mL sample of the juice to approximately ph required 0.94mL of 0.10M NAOH
Within the Bohr model of the hydrogen atom, the radius of the orbit for the ground state was 5.292 x 10-11 m. Using de Broglie's idea that the circumference of this orbit had to equal the wavelength of the electron
Now consider a sample that consists of four spheres, each with a different mass: blue mass is 4.00 g, red mass is 3.75 g, green mass is 3.00 g, and yellow mass is 1.25 g. Calculate the average mass of a sphere in this sample.
Calculate the enthalpy change for converting 1.00 mol of ice at -50.0°C to water at 70.0°C in kJ. 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..
Typically an adult will inhale 2.1 L of air per breath. What mass of ozone is taken into the lungs per breath by an adult breathing air containing 1.57 x 10^-4 micro(ug) grams of ozone per cm^3 of air?
The equilibrium constant at 25°C is 8.9 × 10-12. One hundred grams of magnesium hydroxide is added to 1.00 L of water and equilibrium is established.
What is the concentration (mol/L) of the chromate ion in a saturated solution of silver chromate
Potassium nitrate has a lattice energy of -163.8kcal/mol and a heat of hydration of -155.5kcal/mol. How much potassium nitrate has to dissolve in water to absorb 117kJ of heat
when 31 mL of 0.200 M HCl has been added to 39 mL of 0.0500 M NH3 solution? HCl is strong acid, Kb = 1.8 × 10-5 for NH3
A white solid is either NaI or NaNO3. If an aqueous solution of the solid is prepared, the addition of which reagent will allow you to distinguish between the two compounds
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