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How many joules of heat are needed to completely vaporize 24.40 grams of water at its boiling point?Given ΔHvap = 40.6 kJ/mol
A saturated solution of calcium iodate, Ca(IO3)2, is created by suspending a small amount of pure solid of Ca(IO3)2 in 50.0 mL of distilled water.
Iron has a body-centered cubic unit cell, and a density of 7.87 g/cm3. Calculate the edge length of the unit cell, in pm.
Calculate the equilibrium concentrations of I2, Cl2, and ICl. (Kc = 0.110 at this temperature.)
A 2.5 L helium balloon is filled at a florist's shop. If the temperature inside the shop is 68°F, what volume will the helium occupy after being left in an automobile at ?5°F in the parking lot for the day
If an automobile is able to travel 224 mi on 10.0 gal of gasoline, what is the gas mileage in km/L
Water autoionizes to produce hydronium ion and hydroxide ion. The product of the concentrations of these ions equals the water autoionization constant, Kw. This ionization constant depends on temperature, the enthalpy change, and the entropy chang..
A 100 mL buffer solution initially has 1.00 M HClO (Ka = 3.0 × 10-8) and 0.75 M NaClO. What is the new pH when this 100 mL of 0.10 M NaOH is added to the initial buffer solution?
calculate the ph that results when 100 mL a liquot of 0.0500 M is added to 400 M of a NH3/NH4+ buffer that is 0.200 M in NH3 and 0.300 M in NH4Cl
Calculate the approximate molarity of this solution from the volume, percent composition, and density.
Calculate the energy in joules and calories lost when 10.0 gm ethanol, {C_2H_5OH}, cools from 62.5 0C to -46.0 0C?
Calculate the initial molarity of Ba(OH)2 and the molarities of Ba2+, OH -, and H3O+ in an aqueous solution that contains 0.70 g of Ba(OH)2 in 0.173 L of solution.
A 1.95 gram sample of sodium sulfate hydrate lost 0.756 gram of water when heated to constant mass. What is the formula of the hydrate?
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