3. What is the concentration of a NaCl solution that contains 0.02 grams of solute dissolved in 5000.0 grams of solution?
Set up
Answer >ppm
4. What is the concentration expressed in parts per million of a solution

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.

i believe the answer is true.