What sport was used to demonstrate Newton's 3 Laws?

What is conserved in the reaction shown below? h2(g) + cl2 (g) --> 2hcl(g)a. mass onlyb. mass and moles onlyc. mass, moles, and molecules onlyd. mass, moles, molecules, and volume

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?

How many peaks will be present in a mass spectrum for brcl?