Q2. Use your reactivity series to work out whether or not these displacement reactions would occur or not. Write true or false after each equation.
a)
Lead chloride + zinc → zinc chloride + lead
b) Tin bromide + lead → lead bromide + tin
c) Aluminium oxide + magnesium → magnesium oxide + aluminium
d) Copper chloride + zinc → zinc chloride + copper
e) 2 AlCl3 + 3 Ca → 3 CaCl2 + 2 AI
f)
2 FeCl3 + 3 Pb → 3 PbCl2 + Fe
B)
SnBr4 + 4 Na → 4 NaBr + Sn

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

the answer would be b i believe

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )