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914g sample of a nonvolatile solid solute dissolves in 9.82g of cyclohexane. the change in the freezing point of the solution is 2.94 degrees c. what is the molality of the solute in the solution
methanol a potential replacement for gasoline can be made from h2 and co by reactions co 2h2 - ch3oh. how will this
What is the standard free energy change (kJ) for the following reaction at 499.0 K ? [Note: Answer should be expressed as "xxx.x", or with one sig fig after the decimal
A magnesium strip is reacted with hydrochloric acid yielding 26.8ml of hydrogen gas. hydrogen gas was collected over water at temp of 27 degres celsius and under a total pressure of 765 mmhg. calculate the mass of the magesium strip
calculate the absorbance of a solution containing 3.70×10-5 M R and 5.64×10-4 M Q at 560 nm. Assume 1.00 cm cells for all data given.
In an investigation of the electron absorption spectrum of a particular element, it is found that a photon having wavelength of 500 nm provides just enough energy to promote an electron from the second quantum level to the third. What is the energ..
We can measure the concentration of HCl solution by reaction with pure sodium carbonate: 2H^+ +Na_2CO_3 -->2Na^+ +H_2O + CO_2. Complete reaction with 0.9674 + and - 0.0009g of Na_2CO_3 (FM 105.9884 + and - 0.0007) required 27.35 + and - 0.04 mL of..
Balance the chemical equation given below, and determine the number of grams of MgO needed to produce 15.0 g of Fe2O3. ___ MgO(s) + ___ Fe(s) ? ___ Fe2O3(s) + ___ Mg(s)
A Ni(II) coordination compound with an octahedral arrangement of ligands has been synthesized containing only water and ammonia as ligands and chloride as counterions. From the following data, determine the exact formula of this compound.
1.i need to prepare a solution of 0.2 l 0.4 m then determine how many cm3 of a solution of h2so4 sulfuric acid 80.0
Write a balanced equation and an expression for Ksp for the dissolution of the given ionic compound. Include states-of-matter. CaCO3 balanced equation: solubility expression
The Ka of a monoprotic weak acid is 2.99 × 10-3. What is the percent ionization of a 0.108 M solution of this acid
a sample of fluorine has a volume of 2.88 l when the temperature is 11.6 degc and the pressure is 649 torr. what will
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