Achemist hypothesizes that mercury oxide (hgo) will undergo a decomposition reaction if it reaches a certain temperature. when the chemist designs his experiment, what should be the only independent variable?

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

a) the particles of the chair are strongly held together.