How many electrons does nitrogen gain in order to achieve a noble-gas electron configuration?

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

What are the chemical names of these compounds? ke: mg3n2: reset next

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