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Gas chromatographic analysis of a mixture of organic compounds (GC-FID) gave the following results: hexane: 27%; heptane: 16%; hexanol: 18%; and toluene: 5%. The rests are solvent and impurities.
a. Calculate the weight percent composition of the mixture (hexane, heptanes, hexanol, and toluene).
b. Calculate the mole percent composition of the mixture.
A compound is 40.0 , 6.70 , and 53.3 by mass. Assume that we have a 100.- sample of this compound.The molecular formula mass of this compound is 180 . What are the subscripts in the actual molecular formula?
the rate constants of some reactions double with every 10 degree rise in temperature. Assume that a reaction takes place at 305K and 315 K. What must the activation energy be for the rate constant to double as described?
Calculate the molarity of of each ion present in the solution. Please walk me through the steps I'm trying to help my daughter with her chem. homework and I don't know any chem.
Calculate Qsp for calcium fluoride (Ksp=3.9x10^-11) when 195.0 mL of a 0.00780 M solution of Ca(NO3)2 is added to 175.0 mL of a 0.00740 M solution of KF
an activation energy of 43.6 kJ/mol, what will be the rate constant for this reaction at 75oC?
4 HCl(aq) + MnO2(s)-> MnCl2(aq) + 2 H2O(g) + Cl2(g) Consider the reaction of 1.53 mol HCl with excess MnO2. How many moles of Cl2 form?
A 2.32 L balloon contains helium at 1.00 atm and 25°C. How many grams of helium are contained in the balloon.
solid NaI is slowly added to a solution that is 0.010 M in Cu+ and 0.010 M in Ag+. which compound will begin to precipitate first?
The solubility of a gas is 0.34 g/L at STP. What is its solubility at a pressure of 0.80 atm and the same temperature?
calculate the number of excess reagent units remaining when 154 C6H14 molecules and 1539 O2 molecules react?
KCL has the same structure as NaCl, the length of the unit cell 638 pm the denstiy of KCl is 1.984 g/cm3 and its formula mass is 74.55 amu. what is avogadro's number?
Calculate the energy required to keep lightbulb burning for 3 hours in each of the energy units of Joules and Kilocalories
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