O alumínio é utilizado como redutor de óxidos, no processo de nominado de aluminotermia, conforme mostra a equação química: 8 Al(s) + 3 Mn3O4(s) → 4 Al2O3(s) + 9Mn(s) Dados: Al2O3(s) H=-1667,8; Mn3O4(s) H= -1385,3 Segundo a equação acima, para a obtenção do Mn(s), qual será a variação de entalpia, em KJ?

What is the molality of a solution that has 4 mol of kci in 0.800 kg of water

Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?