PLEASE HELP ASAP NEED. HELP ASAP NO ROCKY PLS RN I WILL GIVE BRAINLIEST Identify one or more choices that best complete the statement or answer the question.

Formulas of pairs of compounds of nitrogen oxides are given below. Which pairs are consistent for a given mass of nitrogen such that the first compound contains twice the mass of oxygen as the second compound?

a. NO4:NO2
b. NO4:N2O
c. NO2:NO
d. NO:N2O

a., b., and d. only

a. and c. only

a., c., and d. only

c. and d. only

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m=9

step-by-step 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.