Asample of a hydrocarbon is combusted completely in o2(g) to produce 21.83 g co2(g), 4.47 g h2o(g), and 311 kj of heat. a) what is the mass of the initial hydrocarbon sample? b) what is the empirical formula of the hydrocarbon? c) calculate the molar enthalpy of formation (hof) of an empirical formula unit of the hydrocarbon. d) identify the hydrocarbon among those listed in appendix c of the textbook. explain your choice.

What is the strongest intermolecular force between an nacl unit and an h2o molecule together in a solution? covalent bonding dipole-dipole force hydrogen bonding ion-dipole force

Calculate: select the worksheet tab. this tab you calculate the analyte concentration.  fill in the first set of boxes ("moles h2so4" and "moles naoh") based on the coefficients in the balanced equation. (if there is no coefficient, the value is 1.)  record the appropriate volumes in the "ml naoh" and "ml h2so4" boxes.  record the concentration of the titrant in the m naoh box. click calculate. what is the concentration listed

Name the element in group 17, period 2. (periodic table)