equations in chemistry

Question 1

how do you calculate percentage error?

Answer 1

resolution (smallest measurement)/reading
X 100

Question 2

what do you need to remember when doing percentage error calculations for burettes?

Answer 2

multiply resolution by 2 because you take two readings (one at the start, one at the end) with a burette.

Question 3

what is overall order?

Answer 3

sum of orders with respect to each reactant
e.g
rate = k[A][B]2
overall order= 3