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Calculate the total vapor pressure of an ideal solution made by mixing 0.500 mol of ether (C4H10O) with 0.250 mol of ethanol (C2H6O) at 20 degrees Celsius.
The density of pure water at 25 degrees Celsius is 0.997 g/mL. Considering water as being both solvent and solute, calculate its molality, moles of solute per kilogram of solvent at 25 degrees Celsius.
A 34.5-g sample of an alloy at 93.0 degrees Celsius is placed into 50.0 g of water at 22.0 degrees Celsius in an insulated coffee-cup calorimeter with a heat capacity of 9.2 J/K. If the final temperature of the system is 31.1 degrees Celsius, what..
At room temperature 22.0 C the vapor pressure of benzene is 0.302 atm and the vapor pressure of hexane is 0.374 atm. What is the total vapor pressure at room temperature for a 2:1 mixture of hexane to benzene
1.succinctly introduce the following five environments of the company 9 ptsa.social environment external three
Assuming that the loss of ability to recall Chem 401 material is a first-order process with a half-life of 55 days for the traditional (talking head lecture) and a C of 305 days for the active approach,
A gaseous fuel mixture stored at 745mmHg and 298 K contains only methane CH4 and propane C3H8. When 11.5L of this fuel mixture is burned, it produces 774kJ of heat. What is the mole fraction of methane in the mixture
4 Fe(s) + 3 O2(g) → 2 Fe2O3(s). If 12.5 g of iron(III) oxide (rust) are produced from 8.74 g of iron, how much oxygen gas is needed for this reaction?
Calculate how many moles of sodium phosphate are needed to react completely with 4.6 mol of calcium nitrate( Ca(NO 3 ) 2 ) to form sodium nitrate (NaNO 3 ) and calcium phosphate?
Draw a molecular orbital diagram showing the formation of the bond between two hydrogen atoms. Draw all the atomic and molecular orbitals, label them, and show how the electrons fill.
zinc reacts with aqueous sulfuric acid to form hydrogen gaszn s h2so4 aq znso4 aq h2 gin an experiment 201 ml of wet
What is the initial sulfur dioxide concentration (in mol/L or M)?
100 mL of a 0.125 M solution of HBr was titrated with a 0.100 M solution of KOH at 25 C. The equivalence point will be reached after addition of what volume of the titrant?
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