Marble is 12 g and initially moving at 1.0 m/a to the right. It collided with marble 2, another 12 g marble, which is stationary. If the collision is perfectly elastic, which of the following best describes a possible outcome ?

a police officer and a ambulance

the correct answer is:

a. formation of precipitation

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.

you need to have a picture of the atom that way we can answer it