Please help me I will give you the brain thing and extra points. Two dogs are pulling a disk, but the disk is not moving. The disk does not move because the forces are (select one: unbalanced, balanced, in motion, at rest.)

Consider the following multistep reaction: a b→ab(slow) a ab→a2b(fast)−−−−−−−−−−−−−−−−− 2a b→a2b(overall) based on this mechanism, determine the rate law for the overall reaction. express your answer in standard masteringchemistry format. for example, if the rate law is k[a]3[b]2 type k*[a]^3*[b]^2

If you need to add 27.50ml of a solution, which piece of glassware would you use to deliver this volume and explain how you would determine if the 27.50 ml was measured?

Chortling is used to clean water. another possible atom that would also work is a. sodium b. sulfur c. bromine