For a science experiment, Lorraine is testing a cloth that is electrically charged and an uncharged cloth to see if they will attract an uncharged object. Which cloth is the control in her experiment? A. The charged cloth

B. The uncharged cloth

C. The uncharged object

D. Both cloths

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).

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante