Cho các chất sau: NaOH (1), Mg (2), Ag (3), Al(OH)3 (4), KMnO4 (5), Na2SO4 (6). Những chất nào tác dung được với axit HCl

How did planetesmals form planets? a. they broke apart into smaller chunks.b. they collided and stuck together.c. they cooled and pulled ice together.d. they began to rotate.

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next