Help me please... i'm clueless

The enthalpy of formation of water is -285.8 kj/mol. what can be inferred from this statement?

Here’s one way to follow the scientific method. place the missing steps in the correct position in the process

What are the charges of the subatomic particles by choosing the answer from the drop down menu. protons have a (+1,0,or-1). (protons,neutrons,electrons) have a 0 charge. 3.) electrons have a (+1,0,-1)