If you have a solution that contains 46.85 g of codeine, c18h21no3, in 125.5 g of ethanol, c2h5oh, what is the mole fraction of codeine?

0.22

Explanation:

Given, Mass of = 46.85 g

Molar mass of = 299.4 g/mol

The formula for the calculation of moles is shown below:

Thus,

Given, Mass of = 125.5 g

Molar mass of = 46.07 g/mol

The formula for the calculation of moles is shown below:

Thus,

So, according to definition of mole fraction:

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

level 4 to level 2 : ))