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A 27.00 g sample of an unknown hydrocarbon was burned in excess oxygen to form 88 g of CO2 and 27 g of H2O. What is a possible molecular formula for the hydrocarbon? (the hydrocarbon contains only C and H)
an expandable vessel contains 729 ml of gas at 22degc. what volume will the gas sample in the vessel have if it is
A 60.00 mL sample of 0.075 M benzoic acid was titrated using 0.050 M KOH. What will be the pH at the equivalence point in the titration.
A stock solution is prepared by adding 30 mL of 2 M AlCl3 to enough water to make 80 mL. What is the Cl- concentration of 40 mL of the stock solution
napthalene lowered the freezing point of the solvent by 0.780K. Calculate the molar mass of the compound. [Kf of napthalene= 6.94 K*kg/mol]
titrated with 0.09381M NaOH, 27.63mL were required to reach the equivalence point. The pH at the equivalence point was 10.99. what was the pH when only 19.47mL of NaOH had been added?
I need the important side reactions for the acid-catalyzed dehydration of 2-methycyclohexanol. Also i need the mmol of 2-methylcyclohexanol, phosphoric acid, and isomeric alkene products.
Which of the following is always true for a spontaneous process at constant temperature? A) Delta S system + Delta S surroundings = q/T B) Delta
Calculate the concentration of an pilocarpine solution with a pH = 9.34. The Kb of pilocarpine is 7.41x10-8 i need to know the steps to do problems like this one, if the steps can be simplified that would be great, thanks a lot.
Using the Arrhenius concept of acids and bases, identify the Arrhenius acid and base in each of the following reactions: 2KOH(aq) + H2SO4(aq) ---> K2SO4(aq) + 2H2O(l)
Calculate the amount of solution that contains 8.0g calcium cloride (CaCl2) from 35% solution of CaCl2?
A gaseous mixture of O2 and N2 contains 36.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 685 mmHg.
Suppose that 28g of each of the following substances is initially at 25.0^\circ C. What is the final temperature of each substance upon absorbing 2.30kJ of heat? Express in two significant figures a. Gold b. Silver c. Aluminium d. Water
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