The fastest recorded human footspeed was Usain Bolt's world record 9.58-second 100m final in Berlin in 2009. He was clocked at 44.72km/h. What is this speed in miles per hour?

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

dynamic equilibrium is the answer.

im pretty sure its b