The student added 1.0 mathrm(~g) of magnesium to 50 mathrm(~cm)^3 of zinc sulfate solution and measured the temperature increase. The student repeated the experiment two more times. The table below shows the results. multicolumn(4)(|c|)( Temperature increase in ( )^circ mathrm(C) ) Experiment 1 & Experiment 2 & Experiment 3 & Mean 7.6 & 7.3 & 7.6 & Y (c) Calculate value Y in the table. [ Y= ] ( )^circ mathrm(C) (2)

## Step1: Identify the data given### In the question, an experiment was conducted three times, and a different temperature increase was recorded each time. We want to find , the mean temperature increase.## Step2: Understand the concept of mean### Also known as the arithmetic average, the mean is equal to the sum of the values divided by the number of values.## Step3: Apply the formula for mean to calculate .### The formula for mean could be represented mathematically as garnished as: ### ** **### For this question the sum is the sum of temperatures from Experiment 1, 2 and 3 which gives = 7.6°C + 7.3°C +7.6°C = 22.5°C] ## Step 4: Perform the calculation### There are three measurements in total so, to finish the calculation we have to divide the total sum by 3:### ** **