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One compound contains 80.78% C, 13.56% H, and 5.66% OF. A solution of 1.03g of this in 7.49g of benzene freezes at 3.01 degrees C. What are the molecular formula and molar mass?
What mass of NaOH can this buffer neutralize before the pH rises above 4.00?
A gaseous compound containing hydrogen and carbon is decomposed and found to contain 85.63% C and 14.37 H by mass. The mass of 258 mL of the gas, measured at STP is 0.646 g. What is the molecular formula of the compound?
Estimate the triple point pressure and temperature of water, given that the standard enthalpies of fusion and vaporization are 6008 j/mol and 43990 J/h at 273.15k and 298.15 k, respectively the vapor pressure of water at 25 c is 23.8 torr
Why should care be exercised in the preparation of the column to prevent air bubbles from being trapped in the absorbent
anhydrous ferrous sulfate feso4 crystals are produced from an aqueous solution in a two step process. a solution of
dry ice solid co2 has a vapor pressure of 1 atm at -77.2 deg celsius and 2 atm at -69.1 deg celsius. calculate molar
A mixture of 1.374g of H2 and 70.31g of Br2 is heated in a 2.00 L vessel at 700 K. These substances react as follows: H2(g) + Br2(g) 2HBr(g) At equilibrium the vessel is found to contain 0.566g of H2.
The temperature of Beaker X = 75°C and the temperature of Beaker Y = 50°C after Five minutes . determine the temperatures be after another 5 minutes have passed?
A chemical reaction is run in which 463 Joules of work is done by the system and the internal energy changes by -1027 Joules. Calculate the amount of heat transferred.
The initial concentration of some weak acid, HA, in an aqueous solution is 0.2150 M, at equilibrium the concentration of HA becomes 0.0955 mol/L.
1 which of the following is evidence for a chemical reaction?a heating purple iodine crystals produces a purple gas.b
What conclusions can you draw about the mobility of metals in acidic environments?
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