A) - zn(no3)2 + - k2003 - - znco3 + --kno3
b) - pbo2 + -- hno3 pb(no3)2 + h20
c) __sbcl3 + h2s - sb2s3 + hcl

you should just be yourself and not let any body tell you other wise.

explanation:

why?

because if they don't love you for your self then they don't deserve you.

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.

i believe the answer is true.

what is the question here. i think you messed up.