A student needs to prepare 50.0 mL of a 0.90 M aqueous H2O2 solution. Calculate the volume of 4.9 M H2O2 stock solution that should be used to prepare the solution.

the answer is a. co2, this would be colder than the : )

explanation:

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.

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it's 3.2 on edge, i just took the test.