A student measured the volume of gas produced in 30 seconds from a reaction between 2g of magnesium and 20cm' of 2 mol/dm hydrochloric
acid. The student repeated the experiment 5 times and the volumes
collected (cm) were: 13.5, 13.1. 17.5, 13.7 and 13.0. Calculate the mean,
discounting any anomalies.

Step-by-step explanation:

Observation = 13.5, 13.1, 17.5, 13.7, 13.0

No. of Observations = 5

=> Mean =

=> Mean =

=> Mean =

=> Mean = 14.16

can you me with homework?

step-by-step explanation:

3x + 18 = 147°

step-by-step explanation:

3x + 18 = 147°, because the value of the central angle is equal to the value of the arc formed by it.

i hope i you.