The chemical equation for the combustion of hydrogen is shown below. A scientist burns 6 g of H2 in excess oxygen
and collects 40 g of water. What is the percentage yield of
the reaction?
2H*2 + O*2 2H*2*0

let that person have a turn to speak : )

the ratio of the conjugate base to the acid required to attain the desired ph.

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.