Question

Laura's science teacher gave each student in her class 25.0 grams of iron pellets for an experiment. Each student was required to verify the mass of their pellets by taking four measurements. Which of Laura's measurement was the most precise of the four recorded?
A) 24.99 grams
B) 25.012 grams
C) 25.0122 grams
D) 25.05 grams

Answer 1

The given samples are supposed to weigh 25.0 grams. This value is the basis when we talk about accuracy. In this case, we are talking about precision, so we opt to select the most 'precise' of the choices. The most precise measurement is C) 25.0122 grams. This is because it records up to +- 0.0001 grams.

Answer 2

Answer: Option 'A' is correct.

Step-by-step explanation:

Since we have given that

Weight of iron pellets given to each student by Laura's science teacher = 25.0 grams.

According to question, each student was required to verify the mass of their pellets by taking four measurements.

We can see that all options are approaching 25 grams.

But Option 'B', 'C', 'D' are the value greater than 25.0 grams.

And 24.99 is just approximately 25.0 grams.

So, the most precise of the four recorded is 24.99 grams.

Hence, Option 'A' is correct.