You used a sample of 20 particles to determine the average mass. do you think the average mass you calculated depends on the number of particles in the sample? in other words, would you have gotten a different average mass if you use a sample size of only three particles?

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).

the answer is a and have a great day