Ni(OH)2 + H2(SO4) → Ni(SO4) + H2O this is balancing chemical equations I need help fast

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

Which of the following is the correct definition of chemical energy? a. energy an object has because of its motion or position b. energy resulting from the flow of charged particles, such as electrons or ions c. energy produced from the splitting of atoms d. energy stored in chemical bonds of molecules

Which proportionality applies to avogadro’s law?