What is the molality of a solution prepared by dissolving 0.114 mol of chloroform, CHCl3, in 476 g of toluene, C6H5CH3? 

Which of the following is the correct way to smell a chemical in the lab?   

. What is the mass of H2SO4 in a 38.2-cm3 sample of concentrated sulfuric acid that has a density of 1.84 g/cm3 and consists of 98.3% H2SO4? 

Which of the following statements is/are consistent with the Arrhenius concept of acids and bases?     1.  An Arrhenius acid will increase the concentration of hydronium ion in an aqueous or nonaqueous solvent.     2.  All Arrhenius acids are strong electrolytes in water.     3.  All strong acid-strong base reactions have the same heat of reaction (ΔH°) per mole of water formed. 

What is the pOH of a solution prepared by dissolving 0.591 g of KOH(s) in 7.50 L of water?

Carbon monoxide is toxic because it can successfully compete with oxygen for hemoglobin (Hb) sites according to the following equilibrium:  Hb(O2)4(aq) + 4CO(g)

 A molecular compound contains 92.3 % carbon and 7.7 % hydrogen by mass. If 0.142 mol of the compound weighs 11.08 g, what is its molecular formula? 

Which of the following acids has the weakest conjugate base in aqueous solution? 

The sum of the mole fractions of all components in a solution is: 

 Aparticular compound contains, by mass, 25.5 % carbon, 40.4 % fluorine, and 34.1 % oxygen.  A 0.050-mol sample of this compound weighs 5.80 g.  The molecular formula of this compound is