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The melting point of a newly discovered element is 1935.4°F. Express this temperature in degrees Celsius.
State the chemical composition of the sterol that is present in high levels in most people who belong to the high-risk group. Distinguish between the 'good' and 'bad' forms of this sterol.
When 0.583 g of neon is added to an 800cm^3 bulb containing a sample of argon, the total pressure of the gases is found to be 1.17 atm. at a temperature of 295 Kelvin. Find the mass of the argon in the bulb.
2k2h2 o rarr2koh h2a 5.00 g chunk of potassium is dropped into 1.00 kg water at 24 deg c. what is the final temperature
Acid strength decreases in the series HI > HSO4- > HF > HCN. Which of these anions is the weakest base?
A weather balloon at Earth's surface has a volume of 4 L at 294 K and 746 mm Hg. If the balloon is released and the volume reaches 4.19 L at 715 mm Hg.
solid nahco3 is heated to 90degc. at equilibrium the total pressure of the gases produced is 0.545 atm. calculate
A 50.0 mL sample of aqueous Ca(OH)2 requires 32.66 mL of a .812 M nitric acid for neutralization. Calculate the concentration (molarity) of the original solution of calcium hydroxide.
A 1.00 L buffer solution is 0.150 M in HC7H5O2 and 0.250 M in LiC7H5O2. Calculate the pH of the solution after the addition of 100.0 mL of 1.00 M HCl. The Ka for HC7H5O2 is 6.5 x 10-5.
A system expands in volume from 2.0 L to 24.5 L at constant temperature. Calculate the work (w) if the expansion occurs against a constant pressure of 5.00 atm.
equilibrium at 25C with 5.82L of an aqueous solution of N2O(aq). what is mass of N2O whic is disssolved?
1.75 moles of an ideal gas, for which Cv,m =3R/2, initially at 32.0 C and 2.50*10^6 pa undergoes a two-stage transformation. For each of the following states described in the following list, calculate the final pressure, as well as q, w, ?U, and ?..
How many grams of dry NH4Cl need to be added to 2.10 L of a 0.700 M solution of ammonia, NH3, to prepare a buffer solution that has a pH of 8.89? Kb for ammonia is 1.8*10^-5. mass of NH4Cl
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