Answer:
#1- the percentage is 2.77%
#2 - 218.1336g
#3- 7.89%
#4- 63.8489g
#5- 136.1406g
#6- 340.3515g
#7- 2.387238
#8-
Explanation:
It would be 6 because of the elements
It is a trial aimed to reduce bias during an experiment. An example would be a sugar pill, something that has no real effect so that the results of the true trial can accurately be compared. Its like a control group.