2.Which letter represents a balanced chemical reaction A. 2Zn + 2HCI - 2ZnCl2 +2H2
B. 22n + 3HCI - 3ZnCl2 +2H,
C. Zn + 2HCl - ZnCl2 +H,
D. Zn + 3HCI - ZnCl2 +H,
Ο Α
OB
ос
OD

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?

Which radioisotope is used to date fossils? a. oxygen-16 b. carbon-14 c. uranium-238 d. carbon-12