C. To the other portion, add a small piece of granular zinc and
note any colour change. Decant
to remove the excess zinc and
add dilute NaOH. Compare
with B.​

1. they vary with a higher number because boiling is way hotter than melting

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

a corroding iron, if that's one of your choices

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante