The mole fraction of co2 in a certain solution with h2o as the solvent is 3.6 × 10−4. what is the approximate molality of co2 in this solution? a.0.00036 m. b.0.0065 m. c.0.020 m. d.2.0 × 10−5 m. e.6.5 m

C) 0.020 m

Explanation:

Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent.

where,

n = moles of solute  

= weight of solvent in g  

Mole fraction of is = i.e.  moles of is present in 1 mole of solution.

Moles of solute =

moles of solvent (water) = 1 - = 0.99

weight of solvent =

Molality =

Thus  approximate molality of in this solution is 0.020 m

i need mutiple choices

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.