Problema Solution
10cm(to the 3rd power) of a normal specimen of human blood contains 1.2g of hemoglobin. a new piece of equipment, requiring significant effort to calibrate, was installed in the lab. The first five samples of 25cm(to the 3rd power)yielded the following results. The lab technician believes the machine is not properly calibrated. Is she right to be concerned? Show your calculations and explain your answer
sample 1: 3.50g
sample 2: 3.53g
sample 3: 3.48g
Sample 4: 3.51g
sample 5: 3.46g
Answer provided by our tutors
Let 'x' represent the amount of hemoglobin in 25 cm^3 of blood.
Assuming the amount of hemoglobin is directly proportional to the volume of the sample we can write:
25 : x = 10 : 1.2
........
click here to see the equation solved for x
........
x = 3.00 g
The lab technician should be concern since he is getting results different from 3.00 g.