A chemical reaction is a process in which chemical bonds are broken and new bonds are formed., true, false, A physical change results in the formation of new substances with different properties., true, false, The formation of a precipitate can be evidence that a chemical reaction has occurred., true, false, The evolution of a gas may indicate that a chemical reaction has occurred., true, false

science prep3

Rangliste

Visuel stil

Indstillinger

Skift skabelon

Gendan automatisk gemt: ?