A compound containing only C, H, and O, was extracted from the bark of the sassafras tree. The combustion of 29.5 mg produced 80.1 mg of CO2 and 16.4 mg of H2O. The molar mass of the compound was 162 g/mol. Determine its empirical and molecular formulas.

The empirical formula is .

Explanation:

Given that, the combustion of 29.5 mg produced 80.2 mg CO₂ and 16.4 mg of H₂O.

Mass of C  

                    g

Mass of H

                  g

Mass of O =

                g

Number of mole of C

                                  mol

Number of mole of H

                                    mol

Number of mole O

                                mol

Dividing by lowest integer

The empirical formula is .

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l